[PATCH v1 41/50] mips: octeon: Add cvmx-pcie.c
Stefan Roese
sr at denx.de
Fri Dec 11 17:06:03 CET 2020
From: Aaron Williams <awilliams at marvell.com>
Import cvmx-pcie.c from 2013 U-Boot. It will be used by the later
added drivers to support PCIe and networking on the MIPS Octeon II / III
platforms.
Signed-off-by: Aaron Williams <awilliams at marvell.com>
Signed-off-by: Stefan Roese <sr at denx.de>
---
arch/mips/mach-octeon/cvmx-pcie.c | 2487 +++++++++++++++++++++++++++++
1 file changed, 2487 insertions(+)
create mode 100644 arch/mips/mach-octeon/cvmx-pcie.c
diff --git a/arch/mips/mach-octeon/cvmx-pcie.c b/arch/mips/mach-octeon/cvmx-pcie.c
new file mode 100644
index 0000000000..f42d44cbec
--- /dev/null
+++ b/arch/mips/mach-octeon/cvmx-pcie.c
@@ -0,0 +1,2487 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Marvell International Ltd.
+ *
+ * Interface to PCIe as a host(RC) or target(EP)
+ */
+
+#include <log.h>
+#include <linux/delay.h>
+#include <linux/libfdt.h>
+
+#include <mach/cvmx-regs.h>
+#include <mach/octeon-model.h>
+#include <mach/cvmx-fuse.h>
+#include <mach/octeon-feature.h>
+#include <mach/cvmx-qlm.h>
+#include <mach/octeon_qlm.h>
+
+#include <mach/cvmx-helper-fdt.h>
+
+#include <mach/cvmx-regs.h>
+#include <mach/octeon-model.h>
+#include <mach/cvmx-fuse.h>
+#include <mach/octeon-feature.h>
+#include <mach/cvmx-qlm.h>
+#include <mach/octeon_qlm.h>
+#include <mach/cvmx-pcie.h>
+#include <mach/cvmx-error.h>
+#include <mach/cvmx-helper.h>
+#include <mach/cvmx-helper-util.h>
+#include <mach/cvmx-bgxx-defs.h>
+#include <mach/cvmx-ciu-defs.h>
+#include <mach/cvmx-gmxx-defs.h>
+#include <mach/cvmx-gserx-defs.h>
+#include <mach/cvmx-mio-defs.h>
+#include <mach/cvmx-pciercx-defs.h>
+#include <mach/cvmx-pcieepx-defs.h>
+#include <mach/cvmx-pemx-defs.h>
+#include <mach/cvmx-pexp-defs.h>
+#include <mach/cvmx-rst-defs.h>
+#include <mach/cvmx-sata-defs.h>
+#include <mach/cvmx-sli-defs.h>
+#include <mach/cvmx-sriomaintx-defs.h>
+#include <mach/cvmx-sriox-defs.h>
+
+#include <mach/cvmx-dpi-defs.h>
+#include <mach/cvmx-sli-defs.h>
+#include <mach/cvmx-dtx-defs.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define MRRS_CN6XXX 3 /* 1024 byte Max Read Request Size */
+#define MPS_CN6XXX 0 /* 128 byte Max Packet Size (Limit of most PCs) */
+
+/* Endian swap mode. */
+#define _CVMX_PCIE_ES 1
+
+#define CVMX_READ_CSR(addr) csr_rd_node(node, addr)
+#define CVMX_WRITE_CSR(addr, val) csr_wr_node(node, addr, val)
+#define CVMX_PCIE_CFGX_READ(p, addr) cvmx_pcie_cfgx_read_node(node, p, addr)
+#define CVMX_PCIE_CFGX_WRITE(p, addr, val) cvmx_pcie_cfgx_write_node(node, p, addr, val)
+
+/* #define DEBUG_PCIE */
+
+/* Delay after link up, before issuing first configuration read */
+#define PCIE_DEVICE_READY_WAIT_DELAY_MICROSECONDS 700000
+
+/* Recommended Preset Vector: Drop Preset 10 */
+int pcie_preset_vec[4] = { 0x593, 0x593, 0x593, 0x593 };
+
+/* Number of LTSSM transitions to record, must be a power of 2 */
+#define LTSSM_HISTORY_SIZE 64
+#define MAX_RETRIES 2
+
+bool pcie_link_initialized[CVMX_MAX_NODES][CVMX_PCIE_MAX_PORTS];
+int cvmx_primary_pcie_bus_number = 1;
+
+static uint32_t __cvmx_pcie_config_read32(int node, int pcie_port, int bus, int dev, int func,
+ int reg, int lst);
+
+/**
+ * Return the Core virtual base address for PCIe IO access. IOs are
+ * read/written as an offset from this address.
+ *
+ * @param pcie_port PCIe port the IO is for
+ *
+ * @return 64bit Octeon IO base address for read/write
+ */
+uint64_t cvmx_pcie_get_io_base_address(int pcie_port)
+{
+ cvmx_pcie_address_t pcie_addr;
+
+ pcie_addr.u64 = 0;
+ pcie_addr.io.upper = 0;
+ pcie_addr.io.io = 1;
+ pcie_addr.io.did = 3;
+ pcie_addr.io.subdid = 2;
+ pcie_addr.io.node = (pcie_port >> 4) & 0x3;
+ pcie_addr.io.es = _CVMX_PCIE_ES;
+ pcie_addr.io.port = (pcie_port & 0x3);
+ return pcie_addr.u64;
+}
+
+/**
+ * Size of the IO address region returned at address
+ * cvmx_pcie_get_io_base_address()
+ *
+ * @param pcie_port PCIe port the IO is for
+ *
+ * @return Size of the IO window
+ */
+uint64_t cvmx_pcie_get_io_size(int pcie_port)
+{
+ return 1ull << 32;
+}
+
+/**
+ * Return the Core virtual base address for PCIe MEM access. Memory is
+ * read/written as an offset from this address.
+ *
+ * @param pcie_port PCIe port the IO is for
+ *
+ * @return 64bit Octeon IO base address for read/write
+ */
+uint64_t cvmx_pcie_get_mem_base_address(int pcie_port)
+{
+ cvmx_pcie_address_t pcie_addr;
+
+ pcie_addr.u64 = 0;
+ pcie_addr.mem.upper = 0;
+ pcie_addr.mem.io = 1;
+ pcie_addr.mem.did = 3;
+ pcie_addr.mem.subdid = 3 + (pcie_port & 0x3);
+ pcie_addr.mem.node = (pcie_port >> 4) & 0x3;
+ return pcie_addr.u64;
+}
+
+/**
+ * Size of the Mem address region returned at address
+ * cvmx_pcie_get_mem_base_address()
+ *
+ * @param pcie_port PCIe port the IO is for
+ *
+ * @return Size of the Mem window
+ */
+uint64_t cvmx_pcie_get_mem_size(int pcie_port)
+{
+ return 1ull << 36;
+}
+
+/**
+ * @INTERNAL
+ * Return the QLM number for the PCIE port.
+ *
+ * @param pcie_port QLM number to return for.
+ *
+ * @return QLM number.
+ */
+static int __cvmx_pcie_get_qlm(int node, int pcie_port)
+{
+ if (OCTEON_IS_MODEL(OCTEON_CN73XX)) {
+ cvmx_pemx_cfg_t pem_cfg;
+ cvmx_pemx_qlm_t pem_qlm;
+ cvmx_gserx_cfg_t gserx_cfg;
+
+ switch (pcie_port) {
+ case 0: /* PEM0 */
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(0));
+ if (gserx_cfg.s.pcie)
+ return 0; /* PEM0 is on QLM0 and possibly QLM1 */
+ else
+ return -1; /* PEM0 is disabled */
+ case 1: /* PEM1 */
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(0));
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(1));
+ if (!pem_cfg.cn78xx.lanes8 && gserx_cfg.s.pcie)
+ return 1; /* PEM1 is on QLM 1 */
+ else
+ return -1; /* PEM1 is disabled */
+ case 2: /* PEM2 */
+ pem_qlm.u64 = CVMX_READ_CSR(CVMX_PEMX_QLM(2));
+ if (pem_qlm.cn73xx.pemdlmsel == 1) {
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(5));
+ if (gserx_cfg.s.pcie)
+ return 5; /* PEM2 is on DLM5 */
+ else
+ return -1; /* PEM2 is disabled */
+ }
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(2));
+ if (gserx_cfg.s.pcie)
+ return 2; /* PEM2 is on QLM2 and possibly QLM3 */
+ else
+ return -1; /* PEM2 is disabled */
+ case 3: /* PEM3 */
+ pem_qlm.u64 = CVMX_READ_CSR(CVMX_PEMX_QLM(3));
+ if (pem_qlm.cn73xx.pemdlmsel == 1) {
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(6));
+ if (gserx_cfg.s.pcie)
+ return 6; /* PEM2 is on DLM5 */
+ else
+ return -1; /* PEM2 is disabled */
+ }
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(2));
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(3));
+ if (!pem_cfg.cn78xx.lanes8 && gserx_cfg.s.pcie)
+ return 3; /* PEM2 is on QLM2 and possibly QLM3 */
+ else
+ return -1; /* PEM2 is disabled */
+ default:
+ printf("Invalid %d PCIe port\n", pcie_port);
+ return -2;
+ }
+ } else if (OCTEON_IS_MODEL(OCTEON_CN78XX)) {
+ cvmx_pemx_cfg_t pem_cfg;
+ cvmx_gserx_cfg_t gserx_cfg;
+
+ switch (pcie_port) {
+ case 0:
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(0));
+ if (gserx_cfg.s.pcie)
+ return 0; /* PEM0 is on QLM0 and possibly QLM1 */
+ else
+ return -1; /* PEM0 is disabled */
+ case 1: /* PEM1 */
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(0));
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(1));
+ if (!pem_cfg.cn78xx.lanes8 && gserx_cfg.s.pcie)
+ return 1; /* PEM1 is on QLM 1 */
+ else
+ return -1; /* PEM1 is disabled */
+ case 2: /* PEM2 */
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(2));
+ if (gserx_cfg.s.pcie)
+ return 2; /* PEM2 is on QLM2 and possibly QLM3 */
+ else
+ return -1; /* PEM2 is disabled */
+ case 3: /* PEM3 */
+ {
+ cvmx_gserx_cfg_t gser4_cfg;
+
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(2));
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(3));
+ gser4_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(4));
+ if (pem_cfg.cn78xx.lanes8) {
+ if (gser4_cfg.s.pcie)
+ return 4; /* PEM3 is on QLM4 */
+ else
+ return -1; /* PEM3 is disabled */
+ } else {
+ if (gserx_cfg.s.pcie)
+ return 3; /* PEM3 is on QLM3 */
+ else if (gser4_cfg.s.pcie)
+ return 4; /* PEM3 is on QLM4 */
+ else
+ return -1; /* PEM3 is disabled */
+ }
+ }
+ default:
+ printf("Invalid %d PCIe port\n", pcie_port);
+ return -1;
+ }
+ } else if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ enum cvmx_qlm_mode mode1 = cvmx_qlm_get_mode(1);
+ enum cvmx_qlm_mode mode2 = cvmx_qlm_get_mode(2);
+
+ switch (pcie_port) {
+ case 0: /* PCIe0 can be DLM1 with 1, 2 or 4 lanes */
+ if (mode1 == CVMX_QLM_MODE_PCIE || /* Using DLM 1-2 */
+ mode1 == CVMX_QLM_MODE_PCIE_1X2 || /* Using DLM 1 */
+ mode1 == CVMX_QLM_MODE_PCIE_2X1 || /* Using DLM 1, lane 0 */
+ mode1 == CVMX_QLM_MODE_PCIE_1X1) /* Using DLM 1, l0, l1 not used */
+ return 1;
+ else
+ return -1;
+ case 1: /* PCIe1 can be DLM1 1 lane(1), DLM2 1 lane(0) or 2 lanes(0-1) */
+ if (mode1 == CVMX_QLM_MODE_PCIE_2X1)
+ return 1;
+ else if (mode2 == CVMX_QLM_MODE_PCIE_1X2)
+ return 2;
+ else if (mode2 == CVMX_QLM_MODE_PCIE_2X1)
+ return 2;
+ else
+ return -1;
+ case 2: /* PCIe2 can be DLM2 1 lanes(1) */
+ if (mode2 == CVMX_QLM_MODE_PCIE_2X1)
+ return 2;
+ else
+ return -1;
+ default: /* Only three PEM blocks */
+ return -1;
+ }
+ } else if (OCTEON_IS_MODEL(OCTEON_CNF75XX)) {
+ cvmx_gserx_cfg_t gserx_cfg;
+
+ switch (pcie_port) {
+ case 0: /* PEM0 */
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(0));
+ if (gserx_cfg.s.pcie)
+ return 0; /* PEM0 is on QLM0 and possibly QLM1 */
+ else
+ return -1; /* PEM0 is disabled */
+ case 1: /* PEM1 */
+ gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(1));
+ if (gserx_cfg.s.pcie)
+ return 1; /* PEM1 is on DLM1 */
+ else
+ return -1; /* PEM1 is disabled */
+ default:
+ return -1;
+ }
+ }
+ return -1;
+}
+
+/**
+ * @INTERNAL
+ * Initialize the RC config space CSRs
+ *
+ * @param node node
+ * @param pcie_port PCIe port to initialize
+ */
+static void __cvmx_pcie_rc_initialize_config_space(int node, int pcie_port)
+{
+ /* Max Payload Size (PCIE*_CFG030[MPS]) */
+ /* Max Read Request Size (PCIE*_CFG030[MRRS]) */
+ /* Relaxed-order, no-snoop enables (PCIE*_CFG030[RO_EN,NS_EN] */
+ /* Error Message Enables (PCIE*_CFG030[CE_EN,NFE_EN,FE_EN,UR_EN]) */
+ {
+ cvmx_pciercx_cfg030_t pciercx_cfg030;
+
+ pciercx_cfg030.u32 = CVMX_PCIE_CFGX_READ(pcie_port,
+ CVMX_PCIERCX_CFG030(pcie_port));
+ pciercx_cfg030.s.mps = MPS_CN6XXX;
+ pciercx_cfg030.s.mrrs = MRRS_CN6XXX;
+ /*
+ * Enable relaxed order processing. This will allow devices
+ * to affect read response ordering
+ */
+ pciercx_cfg030.s.ro_en = 1;
+ /* Enable no snoop processing. Not used by Octeon */
+ pciercx_cfg030.s.ns_en = 1;
+ /* Correctable error reporting enable. */
+ pciercx_cfg030.s.ce_en = 1;
+ /* Non-fatal error reporting enable. */
+ pciercx_cfg030.s.nfe_en = 1;
+ /* Fatal error reporting enable. */
+ pciercx_cfg030.s.fe_en = 1;
+ /* Unsupported request reporting enable. */
+ pciercx_cfg030.s.ur_en = 1;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG030(pcie_port),
+ pciercx_cfg030.u32);
+ }
+
+ /*
+ * Max Payload Size (DPI_SLI_PRTX_CFG[MPS]) must match
+ * PCIE*_CFG030[MPS]
+ */
+ /*
+ * Max Read Request Size (DPI_SLI_PRTX_CFG[MRRS]) must not exceed
+ * PCIE*_CFG030[MRRS]
+ */
+ cvmx_dpi_sli_prtx_cfg_t prt_cfg;
+ cvmx_sli_s2m_portx_ctl_t sli_s2m_portx_ctl;
+
+ prt_cfg.u64 = CVMX_READ_CSR(CVMX_DPI_SLI_PRTX_CFG(pcie_port));
+ prt_cfg.s.mps = MPS_CN6XXX;
+ prt_cfg.s.mrrs = MRRS_CN6XXX;
+ /* Max outstanding load request. */
+ prt_cfg.s.molr = 32;
+ CVMX_WRITE_CSR(CVMX_DPI_SLI_PRTX_CFG(pcie_port), prt_cfg.u64);
+
+ sli_s2m_portx_ctl.u64 = CVMX_READ_CSR(CVMX_PEXP_SLI_S2M_PORTX_CTL(pcie_port));
+ if (!(OCTEON_IS_MODEL(OCTEON_CN78XX) || OCTEON_IS_MODEL(OCTEON_CN73XX) ||
+ OCTEON_IS_MODEL(OCTEON_CNF75XX)))
+ sli_s2m_portx_ctl.cn61xx.mrrs = MRRS_CN6XXX;
+ CVMX_WRITE_CSR(CVMX_PEXP_SLI_S2M_PORTX_CTL(pcie_port), sli_s2m_portx_ctl.u64);
+
+ /* ECRC Generation (PCIE*_CFG070[GE,CE]) */
+ {
+ cvmx_pciercx_cfg070_t pciercx_cfg070;
+
+ pciercx_cfg070.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG070(pcie_port));
+ pciercx_cfg070.s.ge = 1; /* ECRC generation enable. */
+ pciercx_cfg070.s.ce = 1; /* ECRC check enable. */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG070(pcie_port), pciercx_cfg070.u32);
+ }
+
+ /* Access Enables (PCIE*_CFG001[MSAE,ME]) */
+ /* ME and MSAE should always be set. */
+ /* Interrupt Disable (PCIE*_CFG001[I_DIS]) */
+ /* System Error Message Enable (PCIE*_CFG001[SEE]) */
+ {
+ cvmx_pciercx_cfg001_t pciercx_cfg001;
+
+ pciercx_cfg001.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG001(pcie_port));
+ pciercx_cfg001.s.msae = 1; /* Memory space enable. */
+ pciercx_cfg001.s.me = 1; /* Bus master enable. */
+ pciercx_cfg001.s.i_dis = 1; /* INTx assertion disable. */
+ pciercx_cfg001.s.see = 1; /* SERR# enable */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG001(pcie_port), pciercx_cfg001.u32);
+ }
+
+ /* Advanced Error Recovery Message Enables */
+ /* (PCIE*_CFG066,PCIE*_CFG067,PCIE*_CFG069) */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG066(pcie_port), 0);
+ /* Use CVMX_PCIERCX_CFG067 hardware default */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG069(pcie_port), 0);
+
+ /* Active State Power Management (PCIE*_CFG032[ASLPC]) */
+ {
+ cvmx_pciercx_cfg032_t pciercx_cfg032;
+
+ pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
+ pciercx_cfg032.s.aslpc = 0; /* Active state Link PM control. */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG032(pcie_port), pciercx_cfg032.u32);
+ }
+
+ /* Link Width Mode (PCIERCn_CFG452[LME]) - Set during
+ * cvmx_pcie_rc_initialize_link()
+ */
+ /* Primary Bus Number (PCIERCn_CFG006[PBNUM]) */
+ {
+ /* We set the primary bus number to 1 so IDT bridges are happy.
+ * They don't like zero
+ */
+ cvmx_pciercx_cfg006_t pciercx_cfg006;
+
+ pciercx_cfg006.u32 = 0;
+ pciercx_cfg006.s.pbnum = cvmx_primary_pcie_bus_number;
+ pciercx_cfg006.s.sbnum = cvmx_primary_pcie_bus_number;
+ pciercx_cfg006.s.subbnum = cvmx_primary_pcie_bus_number;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG006(pcie_port), pciercx_cfg006.u32);
+ }
+
+ /* Memory-mapped I/O BAR (PCIERCn_CFG008) */
+ /* Most applications should disable the memory-mapped I/O BAR by */
+ /* setting PCIERCn_CFG008[ML_ADDR] < PCIERCn_CFG008[MB_ADDR] */
+ {
+ cvmx_pciercx_cfg008_t pciercx_cfg008;
+
+ pciercx_cfg008.u32 = 0;
+ pciercx_cfg008.s.mb_addr = 0x100;
+ pciercx_cfg008.s.ml_addr = 0;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG008(pcie_port), pciercx_cfg008.u32);
+ }
+
+ /* Prefetchable BAR (PCIERCn_CFG009,PCIERCn_CFG010,PCIERCn_CFG011) */
+ /* Most applications should disable the prefetchable BAR by setting */
+ /* PCIERCn_CFG011[UMEM_LIMIT],PCIERCn_CFG009[LMEM_LIMIT] < */
+ /* PCIERCn_CFG010[UMEM_BASE],PCIERCn_CFG009[LMEM_BASE] */
+ {
+ cvmx_pciercx_cfg009_t pciercx_cfg009;
+ cvmx_pciercx_cfg010_t pciercx_cfg010;
+ cvmx_pciercx_cfg011_t pciercx_cfg011;
+
+ pciercx_cfg009.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG009(pcie_port));
+ pciercx_cfg010.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG010(pcie_port));
+ pciercx_cfg011.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG011(pcie_port));
+ pciercx_cfg009.s.lmem_base = 0x100;
+ pciercx_cfg009.s.lmem_limit = 0;
+ pciercx_cfg010.s.umem_base = 0x100;
+ pciercx_cfg011.s.umem_limit = 0;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG009(pcie_port), pciercx_cfg009.u32);
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG010(pcie_port), pciercx_cfg010.u32);
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG011(pcie_port), pciercx_cfg011.u32);
+ }
+
+ /* System Error Interrupt Enables (PCIERCn_CFG035[SECEE,SEFEE,SENFEE]) */
+ /* PME Interrupt Enables (PCIERCn_CFG035[PMEIE]) */
+ {
+ cvmx_pciercx_cfg035_t pciercx_cfg035;
+
+ pciercx_cfg035.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG035(pcie_port));
+ pciercx_cfg035.s.secee = 1; /* System error on correctable error enable. */
+ pciercx_cfg035.s.sefee = 1; /* System error on fatal error enable. */
+ pciercx_cfg035.s.senfee = 1; /* System error on non-fatal error enable. */
+ pciercx_cfg035.s.pmeie = 1; /* PME interrupt enable. */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG035(pcie_port), pciercx_cfg035.u32);
+ }
+
+ /* Advanced Error Recovery Interrupt Enables */
+ /* (PCIERCn_CFG075[CERE,NFERE,FERE]) */
+ {
+ cvmx_pciercx_cfg075_t pciercx_cfg075;
+
+ pciercx_cfg075.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG075(pcie_port));
+ pciercx_cfg075.s.cere = 1; /* Correctable error reporting enable. */
+ pciercx_cfg075.s.nfere = 1; /* Non-fatal error reporting enable. */
+ pciercx_cfg075.s.fere = 1; /* Fatal error reporting enable. */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG075(pcie_port), pciercx_cfg075.u32);
+ }
+
+ /* HP Interrupt Enables (PCIERCn_CFG034[HPINT_EN], */
+ /* PCIERCn_CFG034[DLLS_EN,CCINT_EN]) */
+ {
+ cvmx_pciercx_cfg034_t pciercx_cfg034;
+
+ pciercx_cfg034.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG034(pcie_port));
+ pciercx_cfg034.s.hpint_en = 1; /* Hot-plug interrupt enable. */
+ pciercx_cfg034.s.dlls_en = 1; /* Data Link Layer state changed enable */
+ pciercx_cfg034.s.ccint_en = 1; /* Command completed interrupt enable. */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG034(pcie_port), pciercx_cfg034.u32);
+ }
+
+ if (OCTEON_IS_MODEL(OCTEON_CN78XX) || OCTEON_IS_MODEL(OCTEON_CN73XX) ||
+ OCTEON_IS_MODEL(OCTEON_CNF75XX)) {
+ int qlm = __cvmx_pcie_get_qlm(node, pcie_port);
+ int speed = cvmx_qlm_get_gbaud_mhz(qlm);
+ cvmx_pemx_cfg_t pem_cfg;
+ cvmx_pciercx_cfg031_t cfg031;
+ cvmx_pciercx_cfg040_t cfg040;
+ cvmx_pciercx_cfg452_t cfg452;
+ cvmx_pciercx_cfg089_t cfg089;
+ cvmx_pciercx_cfg090_t cfg090;
+ cvmx_pciercx_cfg091_t cfg091;
+ cvmx_pciercx_cfg092_t cfg092;
+ cvmx_pciercx_cfg554_t cfg554;
+
+ /*
+ * Make sure the PEM agrees with GSERX about the speed
+ * its going to try
+ */
+ switch (speed) {
+ case 2500: /* Gen1 */
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
+ pem_cfg.s.md = 0;
+ CVMX_WRITE_CSR(CVMX_PEMX_CFG(pcie_port), pem_cfg.u64);
+
+ /* Set the target link speed */
+ cfg040.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG040(pcie_port));
+ cfg040.s.tls = 1;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG040(pcie_port), cfg040.u32);
+ break;
+ case 5000: /* Gen2 */
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
+ pem_cfg.s.md = 1;
+ CVMX_WRITE_CSR(CVMX_PEMX_CFG(pcie_port), pem_cfg.u64);
+
+ /* Set the target link speed */
+ cfg040.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG040(pcie_port));
+ cfg040.s.tls = 2;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG040(pcie_port), cfg040.u32);
+ break;
+ case 8000: /* Gen3 */
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
+ pem_cfg.s.md = 2;
+ CVMX_WRITE_CSR(CVMX_PEMX_CFG(pcie_port), pem_cfg.u64);
+
+ /* Set the target link speed */
+ cfg040.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG040(pcie_port));
+ cfg040.s.tls = 3;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG040(pcie_port), cfg040.u32);
+ break;
+ default:
+ break;
+ }
+
+ /* Link Width Mode (PCIERCn_CFG452[LME]) */
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
+ cfg452.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG452(pcie_port));
+ if (qlm >= 5)
+ cfg452.s.lme = 0x3;
+ else
+ cfg452.s.lme = (pem_cfg.cn78xx.lanes8) ? 0xf : 0x7;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG452(pcie_port), cfg452.u32);
+
+ /* Errata PEM-25990 - Disable ASLPMS */
+ cfg031.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG031(pcie_port));
+ cfg031.s.aslpms = 0;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG031(pcie_port), cfg031.u32);
+
+ /* CFG554.PRV default changed from 16'h7ff to 16'h593. */
+ cfg554.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG554(pcie_port));
+ cfg554.s.prv = pcie_preset_vec[pcie_port];
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG554(pcie_port), cfg554.u32);
+ /* Errata PEM-26189 - Disable the 2ms timer on all chips */
+ cfg554.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG554(pcie_port));
+ cfg554.s.p23td = 1;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG554(pcie_port), cfg554.u32);
+
+ /* Errata PEM-21178 - Change the CFG[089-092] LxUTP & LxDTP defaults. */
+ cfg089.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG089(pcie_port));
+ cfg089.s.l1ddtp = 7;
+ cfg089.s.l1utp = 7;
+ cfg089.s.l0dtp = 7;
+ cfg089.s.l0utp = 7;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG089(pcie_port), cfg089.u32);
+ cfg090.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG090(pcie_port));
+ cfg090.s.l3dtp = 7;
+ cfg090.s.l3utp = 7;
+ cfg090.s.l2dtp = 7;
+ cfg090.s.l2utp = 7;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG090(pcie_port), cfg090.u32);
+ cfg091.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG091(pcie_port));
+ cfg091.s.l5dtp = 7;
+ cfg091.s.l5utp = 7;
+ cfg091.s.l4dtp = 7;
+ cfg091.s.l4utp = 7;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG091(pcie_port), cfg091.u32);
+ cfg092.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG092(pcie_port));
+ cfg092.s.l7dtp = 7;
+ cfg092.s.l7utp = 7;
+ cfg092.s.l6dtp = 7;
+ cfg092.s.l6utp = 7;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG092(pcie_port), cfg092.u32);
+ }
+}
+
+static void __cvmx_increment_ba(cvmx_sli_mem_access_subidx_t *pmas)
+{
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+ pmas->cn68xx.ba++;
+ else
+ pmas->cn63xx.ba++;
+}
+
+/*
+ * milliseconds to retry PCIe cfg-space access:
+ * Value 32(unscaled) was recommended in HRM, but may be too small for
+ * some PCIe devices. This 200mS default should cover most devices,
+ * but can be extended by bootparam cvmx-pcie.cfg_timeout, or reduced
+ * to speed boot if it is known that no devices need so much time.
+ */
+static int cfg_timeout = 200;
+
+static int cfg_retries(void)
+{
+ static int cfg_ticks = -1;
+
+ if (cfg_ticks < 0) {
+ u64 nS = cfg_timeout * 1000000;
+ const int ceiling = 0xffff;
+
+ cfg_ticks = nS / (gd->bus_clk >> 16);
+ if (cfg_ticks > ceiling)
+ cfg_ticks = ceiling;
+ }
+
+ return cfg_ticks;
+}
+
+/**
+ * @INTERNAL
+ * Enable/Disable PEMX_PEMON.pemon based on the direction.
+ *
+ * @param node node
+ * @param pcie_port PCIe port
+ * @param direction 0 to disable, 1 to enable
+ */
+static void __cvmx_pcie_config_pemon(int node, int pcie_port, bool direction)
+{
+ cvmx_pemx_on_t pemon;
+
+ pemon.u64 = CVMX_READ_CSR(CVMX_PEMX_ON(pcie_port));
+ pemon.s.pemon = direction;
+ CVMX_WRITE_CSR(CVMX_PEMX_ON(pcie_port), pemon.u64);
+ pemon.u64 = CVMX_READ_CSR(CVMX_PEMX_ON(pcie_port));
+}
+
+/**
+ * @INTERNAL
+ * De-assert GSER_PHY.phy_reset for a given qlm
+ *
+ * @param node node
+ * @param qlm qlm for a given PCIe port
+ */
+static void __cvmx_pcie_gser_phy_config(int node, int pcie_port, int qlm)
+{
+ cvmx_pemx_cfg_t pem_cfg;
+ cvmx_gserx_phy_ctl_t ctrl;
+ int has_8lanes = 0;
+ int is_gen3 = 0;
+
+ ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm));
+
+ /* Assert the reset */
+ ctrl.s.phy_reset = 1;
+ CVMX_WRITE_CSR(CVMX_GSERX_PHY_CTL(qlm), ctrl.u64);
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
+ udelay(10);
+
+ has_8lanes = pem_cfg.cn78xx.lanes8;
+ is_gen3 = pem_cfg.cn78xx.md >= 2;
+
+ if (has_8lanes) {
+ ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm + 1));
+ ctrl.s.phy_reset = 1;
+ CVMX_WRITE_CSR(CVMX_GSERX_PHY_CTL(qlm + 1), ctrl.u64);
+ ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm + 1));
+ }
+ ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm));
+ udelay(10);
+
+ /* Deassert the reset */
+ ctrl.s.phy_reset = 0;
+ CVMX_WRITE_CSR(CVMX_GSERX_PHY_CTL(qlm), ctrl.u64);
+ pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
+ udelay(500);
+
+ if (has_8lanes) {
+ ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm + 1));
+ ctrl.s.phy_reset = 0;
+ CVMX_WRITE_CSR(CVMX_GSERX_PHY_CTL(qlm + 1), ctrl.u64);
+ }
+ ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm));
+ udelay(500);
+
+ /* Apply some erratas after PHY reset, only applies to PCIe GEN3 */
+ if (is_gen3) {
+ int i;
+ int high_qlm = has_8lanes ? qlm + 1 : qlm;
+
+ /* Apply workaround for Errata GSER-26150 */
+ if (OCTEON_IS_MODEL(OCTEON_CN73XX_PASS1_0)) {
+ for (i = qlm; i < high_qlm; i++) {
+ cvmx_gserx_glbl_pll_cfg_3_t pll_cfg_3;
+ cvmx_gserx_glbl_misc_config_1_t misc_config_1;
+ /* Update PLL parameters */
+ /*
+ * Step 1: Set
+ * GSER()_GLBL_PLL_CFG_3[PLL_VCTRL_SEL_LCVCO_VAL] = 0x2,
+ * and
+ * GSER()_GLBL_PLL_CFG_3[PCS_SDS_PLL_VCO_AMP] = 0
+ */
+ pll_cfg_3.u64 = CVMX_READ_CSR(CVMX_GSERX_GLBL_PLL_CFG_3(i));
+ pll_cfg_3.s.pcs_sds_pll_vco_amp = 0;
+ pll_cfg_3.s.pll_vctrl_sel_lcvco_val = 2;
+ CVMX_WRITE_CSR(CVMX_GSERX_GLBL_PLL_CFG_3(i), pll_cfg_3.u64);
+
+ /*
+ * Step 2: Set
+ * GSER()_GLBL_MISC_CONFIG_1[PCS_SDS_TRIM_CHP_REG] = 0x2.
+ */
+ misc_config_1.u64 = CVMX_READ_CSR(CVMX_GSERX_GLBL_MISC_CONFIG_1(i));
+ misc_config_1.s.pcs_sds_trim_chp_reg = 2;
+ CVMX_WRITE_CSR(CVMX_GSERX_GLBL_MISC_CONFIG_1(i), misc_config_1.u64);
+ }
+ }
+
+ /* Apply workaround for Errata GSER-25992 */
+ if (OCTEON_IS_MODEL(OCTEON_CN73XX_PASS1_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN78XX_PASS1_X)) {
+ for (i = qlm; i < high_qlm; i++)
+ cvmx_qlm_gser_errata_25992(node, i);
+ }
+ }
+}
+
+/* Get the PCIe LTSSM state for the given port
+ *
+ * @param node Node to query
+ * @param pcie_port PEM to query
+ *
+ * @return LTSSM state
+ */
+static int __cvmx_pcie_rc_get_ltssm_state(int node, int pcie_port)
+{
+ u64 debug;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN73XX) && pcie_port == 0) {
+ CVMX_WRITE_CSR(CVMX_DTX_SPEM_SELX(0), 0);
+ CVMX_READ_CSR(CVMX_DTX_SPEM_SELX(0));
+ CVMX_WRITE_CSR(CVMX_DTX_SPEM_ENAX(0), 0xfffffffffull);
+ CVMX_READ_CSR(CVMX_DTX_SPEM_ENAX(0));
+
+ /* Read the value */
+ debug = CVMX_READ_CSR(CVMX_DTX_SPEM_DATX(0));
+
+ /* Disable the PEM from driving OCLA signals */
+ CVMX_WRITE_CSR(CVMX_DTX_SPEM_ENAX(0), 0);
+ CVMX_READ_CSR(CVMX_DTX_SPEM_ENAX(0));
+ } else {
+ /* LTSSM state is in debug select 0 */
+ CVMX_WRITE_CSR(CVMX_DTX_PEMX_SELX(0, pcie_port), 0);
+ CVMX_READ_CSR(CVMX_DTX_PEMX_SELX(0, pcie_port));
+ CVMX_WRITE_CSR(CVMX_DTX_PEMX_ENAX(0, pcie_port), 0xfffffffffull);
+ CVMX_READ_CSR(CVMX_DTX_PEMX_ENAX(0, pcie_port));
+
+ /* Read the value */
+ debug = CVMX_READ_CSR(CVMX_DTX_PEMX_DATX(0, pcie_port));
+
+ /* Disable the PEM from driving OCLA signals */
+ CVMX_WRITE_CSR(CVMX_DTX_PEMX_ENAX(0, pcie_port), 0);
+ CVMX_READ_CSR(CVMX_DTX_PEMX_ENAX(0, pcie_port));
+ }
+
+ /* DBGSEL = 0x0, bits[8:3] */
+ return cvmx_bit_extract(debug, 3, 6);
+}
+
+/**
+ * Get the PCIe LTSSM state for the given port
+ *
+ * @param node Node to query
+ * @param pcie_port PEM to query
+ *
+ * @return LTSSM state
+ */
+static const char *cvmx_pcie_get_ltssm_string(int ltssm)
+{
+ switch (ltssm) {
+ case 0x00:
+ return "DETECT_QUIET";
+ case 0x01:
+ return "DETECT_ACT";
+ case 0x02:
+ return "POLL_ACTIVE";
+ case 0x03:
+ return "POLL_COMPLIANCE";
+ case 0x04:
+ return "POLL_CONFIG";
+ case 0x05:
+ return "PRE_DETECT_QUIET";
+ case 0x06:
+ return "DETECT_WAIT";
+ case 0x07:
+ return "CFG_LINKWD_START";
+ case 0x08:
+ return "CFG_LINKWD_ACEPT";
+ case 0x09:
+ return "CFG_LANENUM_WAIT";
+ case 0x0A:
+ return "CFG_LANENUM_ACEPT";
+ case 0x0B:
+ return "CFG_COMPLETE";
+ case 0x0C:
+ return "CFG_IDLE";
+ case 0x0D:
+ return "RCVRY_LOCK";
+ case 0x0E:
+ return "RCVRY_SPEED";
+ case 0x0F:
+ return "RCVRY_RCVRCFG";
+ case 0x10:
+ return "RCVRY_IDLE";
+ case 0x11:
+ return "L0";
+ case 0x12:
+ return "L0S";
+ case 0x13:
+ return "L123_SEND_EIDLE";
+ case 0x14:
+ return "L1_IDLE";
+ case 0x15:
+ return "L2_IDLE";
+ case 0x16:
+ return "L2_WAKE";
+ case 0x17:
+ return "DISABLED_ENTRY";
+ case 0x18:
+ return "DISABLED_IDLE";
+ case 0x19:
+ return "DISABLED";
+ case 0x1A:
+ return "LPBK_ENTRY";
+ case 0x1B:
+ return "LPBK_ACTIVE";
+ case 0x1C:
+ return "LPBK_EXIT";
+ case 0x1D:
+ return "LPBK_EXIT_TIMEOUT";
+ case 0x1E:
+ return "HOT_RESET_ENTRY";
+ case 0x1F:
+ return "HOT_RESET";
+ case 0x20:
+ return "RCVRY_EQ0";
+ case 0x21:
+ return "RCVRY_EQ1";
+ case 0x22:
+ return "RCVRY_EQ2";
+ case 0x23:
+ return "RCVRY_EQ3";
+ default:
+ return "Unknown";
+ }
+}
+
+/**
+ * During PCIe link initialization we need to make config request to the attached
+ * device to verify its speed and width. These config access happen very early
+ * after the device is taken out of reset, so may fail for some amount of time.
+ * This function automatically retries these config accesses. The normal builtin
+ * hardware retry isn't enough for this very early access.
+ *
+ * @param node Note to read from
+ * @param pcie_port PCIe port to read from
+ * @param bus PCIe bus number
+ * @param dev PCIe device
+ * @param func PCIe function on the device
+ * @param reg Register to read
+ *
+ * @return Config register value, or all ones on failure
+ */
+static uint32_t cvmx_pcie_config_read32_retry(int node, int pcie_port, int bus, int dev, int func,
+ int reg)
+{
+ /*
+ * Read the PCI config register until we get a valid value. Some cards
+ * require time after link up to return data. Wait at most 3 seconds
+ */
+ u64 timeout = 300;
+ u32 val;
+
+ do {
+ /* Read PCI capability pointer */
+ val = __cvmx_pcie_config_read32(node, pcie_port, bus, dev, func, reg, 0);
+
+ /* Check the read succeeded */
+ if (val != 0xffffffff)
+ return val;
+ /* Failed, wait a little and try again */
+ mdelay(10);
+ } while (--timeout);
+
+ debug("N%d.PCIe%d: Config read failed, can't communicate with device\n",
+ node, pcie_port);
+
+ return -1;
+}
+
+/**
+ * @INTERNAL
+ * Initialize a host mode PCIe gen 2 link. This function takes a PCIe
+ * port from reset to a link up state. Software can then begin
+ * configuring the rest of the link.
+ *
+ * @param node node
+ * @param pcie_port PCIe port to initialize
+ *
+ * @return Zero on success
+ */
+static int __cvmx_pcie_rc_initialize_link_gen2(int node, int pcie_port)
+{
+ u64 start_cycle;
+
+ cvmx_pemx_ctl_status_t pem_ctl_status;
+ cvmx_pciercx_cfg032_t pciercx_cfg032;
+ cvmx_pciercx_cfg448_t pciercx_cfg448;
+
+ if (OCTEON_IS_OCTEON3()) {
+ if (CVMX_WAIT_FOR_FIELD64_NODE(node, CVMX_PEMX_ON(pcie_port), cvmx_pemx_on_t,
+ pemoor, ==, 1, 100000)) {
+ printf("%d:PCIe: Port %d PEM not on, skipping\n", node, pcie_port);
+ return -1;
+ }
+ }
+
+ /* Bring up the link */
+ pem_ctl_status.u64 = CVMX_READ_CSR(CVMX_PEMX_CTL_STATUS(pcie_port));
+ pem_ctl_status.s.lnk_enb = 1;
+ CVMX_WRITE_CSR(CVMX_PEMX_CTL_STATUS(pcie_port), pem_ctl_status.u64);
+
+ /* Wait for the link to come up */
+ start_cycle = get_timer(0);
+ do {
+ if (get_timer(start_cycle) > 1000)
+ return -1;
+
+ udelay(1000);
+ pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port,
+ CVMX_PCIERCX_CFG032(pcie_port));
+ } while ((pciercx_cfg032.s.dlla == 0) || (pciercx_cfg032.s.lt == 1));
+
+ /* Update the Replay Time Limit. Empirically, some PCIe devices take a
+ * little longer to respond than expected under load. As a workaround
+ * for this we configure the Replay Time Limit to the value expected
+ * for a 512 byte MPS instead of our actual 256 byte MPS. The numbers
+ * below are directly from the PCIe spec table 3-4
+ */
+ pciercx_cfg448.u32 = CVMX_PCIE_CFGX_READ(pcie_port,
+ CVMX_PCIERCX_CFG448(pcie_port));
+ switch (pciercx_cfg032.s.nlw) {
+ case 1: /* 1 lane */
+ pciercx_cfg448.s.rtl = 1677;
+ break;
+ case 2: /* 2 lanes */
+ pciercx_cfg448.s.rtl = 867;
+ break;
+ case 4: /* 4 lanes */
+ pciercx_cfg448.s.rtl = 462;
+ break;
+ case 8: /* 8 lanes */
+ pciercx_cfg448.s.rtl = 258;
+ break;
+ }
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG448(pcie_port),
+ pciercx_cfg448.u32);
+
+ return 0;
+}
+
+extern int octeon_pcie_get_qlm_from_fdt(int numa_node, int pcie_port);
+
+static int __cvmx_pcie_check_pcie_port(int node, int pcie_port, enum cvmx_qlm_mode mode)
+{
+ if (mode == CVMX_QLM_MODE_SRIO_1X4 || mode == CVMX_QLM_MODE_SRIO_2X2 ||
+ mode == CVMX_QLM_MODE_SRIO_4X1) {
+ printf("%d:PCIe: Port %d is SRIO, skipping.\n", node, pcie_port);
+ return -1;
+ } else if (mode == CVMX_QLM_MODE_SGMII) {
+ printf("%d:PCIe: Port %d is SGMII, skipping.\n", node, pcie_port);
+ return -1;
+ } else if (mode == CVMX_QLM_MODE_XAUI || mode == CVMX_QLM_MODE_RXAUI) {
+ printf("%d:PCIe: Port %d is XAUI, skipping.\n", node, pcie_port);
+ return -1;
+ } else if (mode == CVMX_QLM_MODE_ILK) {
+ printf("%d:PCIe: Port %d is ILK, skipping.\n", node, pcie_port);
+ return -1;
+ } else if (mode != CVMX_QLM_MODE_PCIE &&
+ mode != CVMX_QLM_MODE_PCIE_1X8 &&
+ mode != CVMX_QLM_MODE_PCIE_1X2 &&
+ mode != CVMX_QLM_MODE_PCIE_2X1 &&
+ mode != CVMX_QLM_MODE_PCIE_1X1) {
+ printf("%d:PCIe: Port %d is unknown, skipping.\n",
+ node, pcie_port);
+ return -1;
+ }
+ return 0;
+}
+
+static int __cvmx_pcie_check_qlm_mode(int node, int pcie_port, int qlm)
+{
+ enum cvmx_qlm_mode mode = CVMX_QLM_MODE_DISABLED;
+
+ if (qlm < 0)
+ return -1;
+
+ /* Make sure this interface is PCIe */
+ if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ if (cvmx_qlm_get_dlm_mode(1, pcie_port) ==
+ CVMX_QLM_MODE_DISABLED) {
+ printf("PCIe: Port %d not in PCIe mode, skipping\n",
+ pcie_port);
+ return -1;
+ }
+ } else if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
+ /*
+ * Requires reading the MIO_QLMX_CFG register to figure
+ * out the port type.
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
+ qlm = 3 - (pcie_port * 2);
+ } else if (OCTEON_IS_MODEL(OCTEON_CN61XX)) {
+ cvmx_mio_qlmx_cfg_t qlm_cfg;
+
+ qlm_cfg.u64 = csr_rd(CVMX_MIO_QLMX_CFG(1));
+ if (qlm_cfg.s.qlm_cfg == 1)
+ qlm = 1;
+ else
+ qlm = pcie_port;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN66XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN63XX)) {
+ qlm = pcie_port;
+ }
+
+ /*
+ * PCIe is allowed only in QLM1, 1 PCIe port in x2 or
+ * 2 PCIe ports in x1
+ */
+ else if (OCTEON_IS_MODEL(OCTEON_CNF71XX))
+ qlm = 1;
+
+ mode = cvmx_qlm_get_mode(qlm);
+
+ __cvmx_pcie_check_pcie_port(node, pcie_port, mode);
+ }
+ return 0;
+}
+
+static void __cvmx_pcie_sli_config(int node, int pcie_port)
+{
+ cvmx_pemx_bar_ctl_t pemx_bar_ctl;
+ cvmx_pemx_ctl_status_t pemx_ctl_status;
+ cvmx_sli_ctl_portx_t sli_ctl_portx;
+ cvmx_sli_mem_access_ctl_t sli_mem_access_ctl;
+ cvmx_sli_mem_access_subidx_t mem_access_subid;
+ cvmx_pemx_bar1_indexx_t bar1_index;
+ int i;
+
+ /* Store merge control (SLI_MEM_ACCESS_CTL[TIMER,MAX_WORD]) */
+ sli_mem_access_ctl.u64 = CVMX_READ_CSR(CVMX_PEXP_SLI_MEM_ACCESS_CTL);
+ sli_mem_access_ctl.s.max_word = 0; /* Allow 16 words to combine */
+ sli_mem_access_ctl.s.timer = 127; /* Wait up to 127 cycles for more data */
+ CVMX_WRITE_CSR(CVMX_PEXP_SLI_MEM_ACCESS_CTL, sli_mem_access_ctl.u64);
+
+ /* Setup Mem access SubDIDs */
+ mem_access_subid.u64 = 0;
+ mem_access_subid.s.port = pcie_port; /* Port the request is sent to. */
+ mem_access_subid.s.nmerge = 0; /* Allow merging as it works on CN6XXX. */
+ mem_access_subid.s.esr = _CVMX_PCIE_ES; /* Endian-swap for Reads. */
+ mem_access_subid.s.esw = _CVMX_PCIE_ES; /* Endian-swap for Writes. */
+ mem_access_subid.s.wtype = 0; /* "No snoop" and "Relaxed ordering" are not set */
+ mem_access_subid.s.rtype = 0; /* "No snoop" and "Relaxed ordering" are not set */
+ /* PCIe Address Bits <63:34>. */
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+ mem_access_subid.cn68xx.ba = 0;
+ else
+ mem_access_subid.cn63xx.ba = 0;
+
+ /* Setup mem access 12-15 for port 0, 16-19 for port 1, supplying 36
+ * bits of address space
+ */
+ for (i = 12 + pcie_port * 4; i < 16 + pcie_port * 4; i++) {
+ CVMX_WRITE_CSR(CVMX_PEXP_SLI_MEM_ACCESS_SUBIDX(i), mem_access_subid.u64);
+ /* Set each SUBID to extend the addressable range */
+ __cvmx_increment_ba(&mem_access_subid);
+ }
+
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX) || OCTEON_IS_MODEL(OCTEON_CN66XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN68XX) ||
+ (OCTEON_IS_OCTEON3() && !OCTEON_IS_MODEL(OCTEON_CN70XX))) {
+ /* Disable the peer to peer forwarding register. This must be
+ * setup by the OS after it enumerates the bus and assigns
+ * addresses to the PCIe busses
+ */
+ for (i = 0; i < 4; i++) {
+ CVMX_WRITE_CSR(CVMX_PEMX_P2P_BARX_START(i, pcie_port), -1);
+ CVMX_WRITE_CSR(CVMX_PEMX_P2P_BARX_END(i, pcie_port), -1);
+ }
+ }
+
+ /* Set Octeon's BAR0 to decode 0-16KB. It overlaps with Bar2 */
+ CVMX_WRITE_CSR(CVMX_PEMX_P2N_BAR0_START(pcie_port), 0);
+
+ /* Set Octeon's BAR2 to decode 0-2^41. Bar0 and Bar1 take precedence
+ * where they overlap. It also overlaps with the device addresses, so
+ * make sure the peer to peer forwarding is set right
+ */
+ CVMX_WRITE_CSR(CVMX_PEMX_P2N_BAR2_START(pcie_port), 0);
+
+ /* Setup BAR2 attributes */
+ /* Relaxed Ordering (NPEI_CTL_PORTn[PTLP_RO,CTLP_RO, WAIT_COM]) */
+ /* - PTLP_RO,CTLP_RO should normally be set (except for debug). */
+ /* - WAIT_COM=0 will likely work for all applications. */
+ /* Load completion relaxed ordering (NPEI_CTL_PORTn[WAITL_COM]) */
+ pemx_bar_ctl.u64 = CVMX_READ_CSR(CVMX_PEMX_BAR_CTL(pcie_port));
+ pemx_bar_ctl.s.bar1_siz = 3; /* 256MB BAR1 */
+ pemx_bar_ctl.s.bar2_enb = 1;
+ pemx_bar_ctl.s.bar2_esx = _CVMX_PCIE_ES;
+ pemx_bar_ctl.s.bar2_cax = 0;
+ CVMX_WRITE_CSR(CVMX_PEMX_BAR_CTL(pcie_port), pemx_bar_ctl.u64);
+ sli_ctl_portx.u64 = CVMX_READ_CSR(CVMX_PEXP_SLI_CTL_PORTX(pcie_port));
+ sli_ctl_portx.s.ptlp_ro = 1;
+ sli_ctl_portx.s.ctlp_ro = 1;
+ sli_ctl_portx.s.wait_com = 0;
+ sli_ctl_portx.s.waitl_com = 0;
+ CVMX_WRITE_CSR(CVMX_PEXP_SLI_CTL_PORTX(pcie_port), sli_ctl_portx.u64);
+
+ /* BAR1 follows BAR2 */
+ CVMX_WRITE_CSR(CVMX_PEMX_P2N_BAR1_START(pcie_port),
+ CVMX_PCIE_BAR1_RC_BASE);
+
+ bar1_index.u64 = 0;
+ bar1_index.s.addr_idx = (CVMX_PCIE_BAR1_PHYS_BASE >> 22);
+ bar1_index.s.ca = 1; /* Not Cached */
+ bar1_index.s.end_swp = _CVMX_PCIE_ES; /* Endian Swap mode */
+ bar1_index.s.addr_v = 1; /* Valid entry */
+
+ for (i = 0; i < 16; i++) {
+ CVMX_WRITE_CSR(CVMX_PEMX_BAR1_INDEXX(i, pcie_port),
+ bar1_index.u64);
+ /* 256MB / 16 >> 22 == 4 */
+ bar1_index.s.addr_idx += (((1ull << 28) / 16ull) >> 22);
+ }
+
+ /* Wait for 200ms */
+ pemx_ctl_status.u64 = CVMX_READ_CSR(CVMX_PEMX_CTL_STATUS(pcie_port));
+ pemx_ctl_status.cn63xx.cfg_rtry = cfg_retries();
+ CVMX_WRITE_CSR(CVMX_PEMX_CTL_STATUS(pcie_port), pemx_ctl_status.u64);
+
+ /*
+ * Here is the second part of the config retry changes. Wait for 700ms
+ * after setting up the link before continuing. PCIe says the devices
+ * may need up to 900ms to come up. 700ms plus 200ms from above gives
+ * us a total of 900ms
+ */
+ if (OCTEON_IS_OCTEON2() || OCTEON_IS_MODEL(OCTEON_CN70XX))
+ udelay(PCIE_DEVICE_READY_WAIT_DELAY_MICROSECONDS);
+}
+
+/**
+ * Initialize a PCIe gen 2 port for use in host(RC) mode. It doesn't enumerate
+ * the bus.
+ *
+ * @param pcie_port PCIe port to initialize
+ *
+ * @return Zero on success
+ */
+static int __cvmx_pcie_rc_initialize_gen2(int pcie_port)
+{
+ cvmx_ciu_soft_prst_t ciu_soft_prst;
+ cvmx_mio_rst_ctlx_t mio_rst_ctl;
+ cvmx_pemx_bist_status_t pemx_bist_status;
+ cvmx_pemx_bist_status2_t pemx_bist_status2;
+ cvmx_pciercx_cfg032_t pciercx_cfg032;
+ cvmx_pciercx_cfg515_t pciercx_cfg515;
+ u64 ciu_soft_prst_reg, rst_ctl_reg;
+ int ep_mode;
+ int qlm = 0;
+ int node = (pcie_port >> 4) & 0x3;
+
+ pcie_port &= 0x3;
+
+ if (pcie_port >= CVMX_PCIE_PORTS) {
+ //debug("Invalid PCIe%d port\n", pcie_port);
+ return -1;
+ }
+
+ if (__cvmx_pcie_check_qlm_mode(node, pcie_port, qlm))
+ return -1;
+
+ /* Make sure we aren't trying to setup a target mode interface in host
+ * mode
+ */
+ if (OCTEON_IS_OCTEON3()) {
+ ciu_soft_prst_reg = CVMX_RST_SOFT_PRSTX(pcie_port);
+ rst_ctl_reg = CVMX_RST_CTLX(pcie_port);
+ } else {
+ ciu_soft_prst_reg = (pcie_port) ? CVMX_CIU_SOFT_PRST1 : CVMX_CIU_SOFT_PRST;
+ rst_ctl_reg = CVMX_MIO_RST_CTLX(pcie_port);
+ }
+ mio_rst_ctl.u64 = CVMX_READ_CSR(rst_ctl_reg);
+
+ ep_mode = ((OCTEON_IS_MODEL(OCTEON_CN61XX) || OCTEON_IS_MODEL(OCTEON_CNF71XX)) ?
+ (mio_rst_ctl.s.prtmode != 1) :
+ (!mio_rst_ctl.s.host_mode));
+
+ if (OCTEON_IS_MODEL(OCTEON_CN70XX) && pcie_port) {
+ cvmx_pemx_cfg_t pemx_cfg;
+
+ pemx_cfg.u64 = csr_rd(CVMX_PEMX_CFG(0));
+ if ((pemx_cfg.s.md & 3) == 2) {
+ printf("PCIe: Port %d in 1x4 mode.\n", pcie_port);
+ return -1;
+ }
+ }
+
+ if (ep_mode) {
+ printf("%d:PCIe: Port %d in endpoint mode.\n", node, pcie_port);
+ return -1;
+ }
+
+ /* CN63XX Pass 1.0 errata G-14395 requires the QLM De-emphasis be
+ * programmed
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_0)) {
+ if (pcie_port) {
+ cvmx_ciu_qlm1_t ciu_qlm;
+
+ ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM1);
+ ciu_qlm.s.txbypass = 1;
+ ciu_qlm.s.txdeemph = 5;
+ ciu_qlm.s.txmargin = 0x17;
+ csr_wr(CVMX_CIU_QLM1, ciu_qlm.u64);
+ } else {
+ cvmx_ciu_qlm0_t ciu_qlm;
+
+ ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM0);
+ ciu_qlm.s.txbypass = 1;
+ ciu_qlm.s.txdeemph = 5;
+ ciu_qlm.s.txmargin = 0x17;
+ csr_wr(CVMX_CIU_QLM0, ciu_qlm.u64);
+ }
+ }
+
+ /* Bring the PCIe out of reset */
+ ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
+ /* After a chip reset the PCIe will also be in reset. If it
+ * isn't, most likely someone is trying to init it again
+ * without a proper PCIe reset.
+ */
+ if (ciu_soft_prst.s.soft_prst == 0) {
+ /* Reset the port */
+ ciu_soft_prst.s.soft_prst = 1;
+ CVMX_WRITE_CSR(ciu_soft_prst_reg, ciu_soft_prst.u64);
+
+ /* Read to make sure write happens */
+ ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
+
+ /* Keep PERST asserted for 2 ms */
+ udelay(2000);
+ }
+
+ /* Deassert PERST */
+ ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
+ ciu_soft_prst.s.soft_prst = 0;
+ CVMX_WRITE_CSR(ciu_soft_prst_reg, ciu_soft_prst.u64);
+ ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
+
+ /* Wait 1ms for PCIe reset to complete */
+ udelay(1000);
+
+ /* Set MPLL multiplier as per Errata 20669. */
+ if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ int qlm = __cvmx_pcie_get_qlm(0, pcie_port);
+ enum cvmx_qlm_mode mode;
+ int old_mult;
+ u64 meas_refclock = cvmx_qlm_measure_clock(qlm);
+
+ if (meas_refclock > 99000000 && meas_refclock < 101000000) {
+ old_mult = 35;
+ } else if (meas_refclock > 124000000 &&
+ meas_refclock < 126000000) {
+ old_mult = 56;
+ } else if (meas_refclock > 156000000 &&
+ meas_refclock < 156500000) {
+ old_mult = 45;
+ } else {
+ printf("%s: Invalid reference clock for qlm %d\n",
+ __func__, qlm);
+ return -1;
+ }
+ mode = cvmx_qlm_get_mode(qlm);
+ __cvmx_qlm_set_mult(qlm, 2500, old_mult);
+ /* Adjust mplls for both dlms when configured as pcie 1x4 */
+ if (mode == CVMX_QLM_MODE_PCIE && pcie_port == 0)
+ __cvmx_qlm_set_mult(qlm + 1, 2500, old_mult);
+ }
+
+ /*
+ * Check and make sure PCIe came out of reset. If it doesn't the board
+ * probably hasn't wired the clocks up and the interface should be
+ * skipped
+ */
+ if (CVMX_WAIT_FOR_FIELD64_NODE(node, rst_ctl_reg, cvmx_mio_rst_ctlx_t,
+ rst_done, ==, 1, 10000)) {
+ printf("%d:PCIe: Port %d stuck in reset, skipping.\n", node, pcie_port);
+ return -1;
+ }
+
+ /* Check BIST status */
+ pemx_bist_status.u64 = CVMX_READ_CSR(CVMX_PEMX_BIST_STATUS(pcie_port));
+ if (pemx_bist_status.u64)
+ printf("%d:PCIe: BIST FAILED for port %d (0x%016llx)\n", node, pcie_port,
+ CAST64(pemx_bist_status.u64));
+ pemx_bist_status2.u64 = CVMX_READ_CSR(CVMX_PEMX_BIST_STATUS2(pcie_port));
+
+ /*
+ * Errata PCIE-14766 may cause the lower 6 bits to be randomly set on
+ * CN63XXp1
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X))
+ pemx_bist_status2.u64 &= ~0x3full;
+
+ if (pemx_bist_status2.u64) {
+ printf("%d:PCIe: BIST2 FAILED for port %d (0x%016llx)\n",
+ node, pcie_port, CAST64(pemx_bist_status2.u64));
+ }
+
+ /* Initialize the config space CSRs */
+ __cvmx_pcie_rc_initialize_config_space(node, pcie_port);
+
+ /* Enable gen2 speed selection */
+ pciercx_cfg515.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG515(pcie_port));
+ pciercx_cfg515.s.dsc = 1;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG515(pcie_port), pciercx_cfg515.u32);
+
+ /* Bring the link up */
+ if (__cvmx_pcie_rc_initialize_link_gen2(node, pcie_port)) {
+ /* Some gen1 devices don't handle the gen 2 training correctly.
+ * Disable gen2 and try again with only gen1
+ */
+ cvmx_pciercx_cfg031_t pciercx_cfg031;
+
+ pciercx_cfg031.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG031(pcie_port));
+ pciercx_cfg031.s.mls = 1;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG031(pcie_port), pciercx_cfg031.u32);
+ if (__cvmx_pcie_rc_initialize_link_gen2(node, pcie_port)) {
+ printf("PCIe: Link timeout on port %d, probably the slot is empty\n",
+ pcie_port);
+ return -1;
+ }
+ }
+
+ __cvmx_pcie_sli_config(node, pcie_port);
+
+ /* Display the link status */
+ pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
+ printf("PCIe: Port %d link active, %d lanes, speed gen%d\n", pcie_port,
+ pciercx_cfg032.s.nlw, pciercx_cfg032.s.ls);
+
+ pcie_link_initialized[node][pcie_port] = true;
+ return 0;
+}
+
+/**
+ * @INTERNAL
+ * Initialize a host mode PCIe gen 2 link. This function takes a PCIe
+ * port from reset to a link up state. Software can then begin
+ * configuring the rest of the link.
+ *
+ * @param node node
+ * @param pcie_port PCIe port to initialize
+ *
+ * @return Zero on success
+ */
+static int __cvmx_pcie_rc_initialize_link_gen2_v3(int node, int pcie_port)
+{
+ u8 ltssm_history[LTSSM_HISTORY_SIZE];
+ int ltssm_history_loc;
+ cvmx_pemx_ctl_status_t pem_ctl_status;
+ cvmx_pciercx_cfg006_t pciercx_cfg006;
+ cvmx_pciercx_cfg031_t pciercx_cfg031;
+ cvmx_pciercx_cfg032_t pciercx_cfg032;
+ cvmx_pciercx_cfg068_t pciercx_cfg068;
+ cvmx_pciercx_cfg448_t pciercx_cfg448;
+ cvmx_pciercx_cfg515_t pciercx_cfg515;
+ int max_gen, max_width;
+ u64 hold_time;
+ u64 bounce_allow_time;
+ u64 timeout, good_time, current_time;
+ int neg_gen, neg_width, bus, dev_gen, dev_width;
+ unsigned int cap, cap_next;
+ int ltssm_state, desired_gen;
+ int desired_width;
+ int i, need_speed_change, need_lane_change;
+ int do_retry_speed = 0;
+ int link_up = 0, is_loop_done = 0;
+
+ if (CVMX_WAIT_FOR_FIELD64_NODE(node, CVMX_PEMX_ON(pcie_port), cvmx_pemx_on_t, pemoor, ==, 1,
+ 100000)) {
+ printf("N%d:PCIe: Port %d PEM not on, skipping\n", node, pcie_port);
+ return -1;
+ }
+
+ /* Record starting LTSSM state for debug */
+ memset(ltssm_history, -1, sizeof(ltssm_history));
+ ltssm_history[0] = __cvmx_pcie_rc_get_ltssm_state(node, pcie_port);
+ ltssm_history_loc = 0;
+
+ pciercx_cfg031.u32 = CVMX_PCIE_CFGX_READ(pcie_port,
+ CVMX_PCIERCX_CFG031(pcie_port));
+ /* Max speed of PEM from config (1-3) */
+ max_gen = pciercx_cfg031.s.mls;
+ /* Max lane width of PEM (1-3) */
+ max_width = pciercx_cfg031.s.mlw;
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link supports up to %d lanes, speed gen%d\n",
+ node, pcie_port, max_width, max_gen);
+#endif
+
+ /* Bring up the link */
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Enabling the link\n", node, pcie_port);
+#endif
+ pem_ctl_status.u64 = CVMX_READ_CSR(CVMX_PEMX_CTL_STATUS(pcie_port));
+ pem_ctl_status.s.lnk_enb = 1;
+ CVMX_WRITE_CSR(CVMX_PEMX_CTL_STATUS(pcie_port), pem_ctl_status.u64);
+
+ /*
+ * Configure SLI after enabling PCIe link. Is required for reading
+ * PCIe card capabilities.
+ */
+ __cvmx_pcie_sli_config(node, pcie_port);
+
+ /*
+ * After the link is enabled no prints until link up or error,
+ * Otherwise will miss link state captures
+ */
+
+retry_speed:
+ /* Clear RC Correctable Error Status Register */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG068(pcie_port), -1);
+
+ /* Wait for the link to come up and link training to be complete */
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Waiting for link\n", node, pcie_port);
+#endif
+
+ /* Timeout of 2 secs */
+ timeout = get_timer(0) + 2000;
+
+ /* Records when the link first went good */
+ good_time = 0;
+
+ do {
+ pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
+ /*
+ * Errata PEM-31375 PEM RSL access to PCLK registers can
+ * timeout during speed change. Check for temporary hardware
+ * timeout, and rety if happens
+ */
+ if (pciercx_cfg032.u32 == 0xffffffff)
+ continue;
+
+ /* Record LTSSM state for debug */
+ ltssm_state = __cvmx_pcie_rc_get_ltssm_state(node, pcie_port);
+
+ if (ltssm_history[ltssm_history_loc] != ltssm_state) {
+ ltssm_history_loc = (ltssm_history_loc + 1) & (LTSSM_HISTORY_SIZE - 1);
+ ltssm_history[ltssm_history_loc] = ltssm_state;
+ }
+
+ /* Check if the link is up */
+ // current_time = cvmx_get_cycle();
+ current_time = get_timer(0);
+ link_up = (pciercx_cfg032.s.dlla && !pciercx_cfg032.s.lt);
+
+ if (link_up) {
+ /* Is this the first link up? */
+ if (!good_time) {
+ /* Mark the time when the link transitioned to good */
+ good_time = current_time;
+ } else {
+ /* Check for a link error */
+ pciercx_cfg068.u32 = CVMX_PCIE_CFGX_READ(
+ pcie_port, CVMX_PCIERCX_CFG068(pcie_port));
+ if (pciercx_cfg068.s.res) {
+ /*
+ * Ignore errors before we've been
+ * stable for bounce_allow_time
+ */
+ if (good_time + bounce_allow_time <=
+ current_time) {
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link errors after link up\n",
+ node, pcie_port);
+#endif
+ /* Link error, signal a retry */
+ return 1;
+ }
+
+ /*
+ * Clear RC Correctable Error
+ * Status Register
+ */
+ CVMX_PCIE_CFGX_WRITE(pcie_port,
+ CVMX_PCIERCX_CFG068(pcie_port),
+ -1);
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Ignored error during settling time\n",
+ node, pcie_port);
+#endif
+ }
+ }
+ } else if (good_time) {
+ if (good_time + bounce_allow_time <= current_time) {
+ /*
+ * We allow bounces for bounce_allow_time after
+ * the link is good. Once this time passes any
+ * bounce requires a retry
+ */
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link bounce detected\n",
+ node, pcie_port);
+#endif
+ return 1; /* Link bounce, signal a retry */
+ }
+
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Ignored bounce during settling time\n",
+ node, pcie_port);
+#endif
+ }
+
+ /* Determine if we've hit the timeout */
+ is_loop_done = (current_time >= timeout);
+
+ /*
+ * Determine if we've had a good link for the required hold
+ * time
+ */
+ is_loop_done |= link_up && (good_time + hold_time <=
+ current_time);
+ } while (!is_loop_done);
+
+ /* Trace the LTSSM state */
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: LTSSM History\n", node, pcie_port);
+#endif
+ for (i = 0; i < LTSSM_HISTORY_SIZE; i++) {
+ ltssm_history_loc = (ltssm_history_loc + 1) & (LTSSM_HISTORY_SIZE - 1);
+#ifdef DEBUG_PCIE
+ if (ltssm_history[ltssm_history_loc] != 0xff)
+ printf("N%d.PCIe%d: %s\n", node, pcie_port,
+ cvmx_pcie_get_ltssm_string(ltssm_history[ltssm_history_loc]));
+#endif
+ }
+
+ if (!link_up) {
+ ltssm_state = __cvmx_pcie_rc_get_ltssm_state(node, pcie_port);
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link down, Data link layer %s(DLLA=%d), Link training %s(LT=%d), LTSSM %s\n",
+ node, pcie_port, pciercx_cfg032.s.dlla ? "active" : "down",
+ pciercx_cfg032.s.dlla, pciercx_cfg032.s.lt ? "active" : "complete",
+ pciercx_cfg032.s.lt, cvmx_pcie_get_ltssm_string(ltssm_state));
+#endif
+ return 1; /* Link down, signal a retry */
+ }
+
+ /* Report the negotiated link speed and width */
+ neg_gen = pciercx_cfg032.s.ls; /* Current speed of PEM (1-3) */
+ neg_width = pciercx_cfg032.s.nlw; /* Current lane width of PEM (1-8) */
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link negotiated %d lanes, speed gen%d\n", node, pcie_port, neg_width,
+ neg_gen);
+#endif
+ /* Determine PCIe bus number the directly attached device uses */
+ pciercx_cfg006.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG006(pcie_port));
+ bus = pciercx_cfg006.s.sbnum;
+
+ /* The SLI has to be initialized so we can read the downstream devices */
+ dev_gen = 1; /* Device max speed (1-3) */
+ dev_width = 1; /* Device max lane width (1-16) */
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Reading Bus %d device max speed and width\n", node, pcie_port, bus);
+#endif
+
+ /*
+ * Here is the second part of the config retry changes. Wait for 700ms
+ * after setting up the link before continuing. PCIe says the devices
+ * may need up to 900ms to come up. 700ms plus 200ms from above gives
+ * us a total of 900ms
+ */
+ udelay(PCIE_DEVICE_READY_WAIT_DELAY_MICROSECONDS);
+
+ /* Read PCI capability pointer at offset 0x34 of target */
+ cap = cvmx_pcie_config_read32_retry(node, pcie_port, bus, 0, 0, 0x34);
+
+ /* Check if we were able to read capabilities pointer */
+ if (cap == 0xffffffff)
+ return 1; /* Signal retry needed */
+
+ /* Read device max speed and width */
+ cap_next = cap & 0xff;
+ while (cap_next) {
+ cap = cvmx_pcie_config_read32_retry(node, pcie_port, bus,
+ 0, 0, cap_next);
+ if (cap == 0xffffffff)
+ return 1; /* Signal retry needed */
+
+ /* Is this a PCIe capability (0x10)? */
+ if ((cap & 0xff) == 0x10) {
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Found PCIe capability at offset 0x%x\n",
+ node, pcie_port, cap_next);
+#endif
+ /* Offset 0xc contains the max link info */
+ cap = cvmx_pcie_config_read32_retry(node, pcie_port, bus, 0, 0,
+ cap_next + 0xc);
+ if (cap == 0xffffffff)
+ return 1; /* Signal retry needed */
+ dev_gen = cap & 0xf; /* Max speed of PEM from config (1-3) */
+ dev_width = (cap >> 4) & 0x3f; /* Max lane width of PEM (1-16) */
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Device supports %d lanes, speed gen%d\n", node,
+ pcie_port, dev_width, dev_gen);
+#endif
+ break;
+ }
+ /* Move to next capability */
+ cap_next = (cap >> 8) & 0xff;
+ }
+
+ /*
+ * Desired link speed and width is either limited by the device or our
+ * PEM configuration. Choose the most restrictive limit
+ */
+ desired_gen = (dev_gen < max_gen) ? dev_gen : max_gen;
+ desired_width = (dev_width < max_width) ? dev_width : max_width;
+
+ /*
+ * We need a change if we don't match the desired speed or width.
+ * Note that we allow better than expected in case the device lied
+ * about its capabilities
+ */
+ need_speed_change = (neg_gen < desired_gen);
+ need_lane_change = (neg_width < desired_width);
+
+ if (need_lane_change) {
+ /* We didn't get the maximum number of lanes */
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link width (%d) less that supported (%d)\n",
+ node, pcie_port, neg_width, desired_width);
+#endif
+ return 2; /* Link wrong width, signal a retry */
+ } else if (need_speed_change) {
+ if (do_retry_speed) {
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link speed (gen%d) less that supported (gen%d)\n", node,
+ pcie_port, neg_gen, desired_gen);
+#endif
+ return 1; /* Link at width, but speed low. Request a retry */
+ }
+
+ /* We didn't get the maximum speed. Request a speed change */
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link speed (gen%d) less that supported (gen%d), requesting a speed change\n",
+ node, pcie_port, neg_gen, desired_gen);
+#endif
+ pciercx_cfg515.u32 =
+ CVMX_PCIE_CFGX_READ(pcie_port,
+ CVMX_PCIERCX_CFG515(pcie_port));
+ pciercx_cfg515.s.dsc = 1;
+ CVMX_PCIE_CFGX_WRITE(pcie_port,
+ CVMX_PCIERCX_CFG515(pcie_port),
+ pciercx_cfg515.u32);
+ mdelay(100);
+ do_retry_speed = true;
+ goto retry_speed;
+ } else {
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link at best speed and width\n",
+ node, pcie_port);
+#endif
+ /* For gen3 links check if we are getting errors over the link */
+ if (neg_gen == 3) {
+ /* Read RC Correctable Error Status Register */
+ pciercx_cfg068.u32 =
+ CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG068(pcie_port));
+ if (pciercx_cfg068.s.res) {
+#ifdef DEBUG_PCIE
+ printf("N%d.PCIe%d: Link reporting error status\n", node,
+ pcie_port);
+#endif
+ return 1; /* Getting receiver errors, request a retry */
+ }
+ }
+ return 0; /* Link at correct speed and width */
+ }
+
+ /* Update the Replay Time Limit. Empirically, some PCIe devices take a
+ * little longer to respond than expected under load. As a workaround
+ * for this we configure the Replay Time Limit to the value expected
+ * for a 512 byte MPS instead of our actual 256 byte MPS. The numbers
+ * below are directly from the PCIe spec table 3-4
+ */
+ pciercx_cfg448.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG448(pcie_port));
+ switch (pciercx_cfg032.s.nlw) {
+ case 1: /* 1 lane */
+ pciercx_cfg448.s.rtl = 1677;
+ break;
+ case 2: /* 2 lanes */
+ pciercx_cfg448.s.rtl = 867;
+ break;
+ case 4: /* 4 lanes */
+ pciercx_cfg448.s.rtl = 462;
+ break;
+ case 8: /* 8 lanes */
+ pciercx_cfg448.s.rtl = 258;
+ break;
+ }
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG448(pcie_port), pciercx_cfg448.u32);
+
+ return 0;
+}
+
+static int __cvmx_pcie_rc_initialize_gen2_v3(int pcie_port)
+{
+ cvmx_rst_ctlx_t rst_ctl;
+ cvmx_rst_soft_prstx_t rst_soft_prst;
+ cvmx_pciercx_cfg031_t pciercx_cfg031;
+ cvmx_pciercx_cfg032_t pciercx_cfg032;
+ cvmx_pciercx_cfg038_t pciercx_cfg038;
+ cvmx_pciercx_cfg040_t pciercx_cfg040;
+ cvmx_pciercx_cfg515_t pciercx_cfg515;
+ cvmx_pciercx_cfg548_t pciercx_cfg548;
+ cvmx_pemx_bist_status_t pemx_bist_status;
+ u64 rst_soft_prst_reg;
+ int qlm;
+ int node = (pcie_port >> 4) & 0x3;
+ bool requires_pem_reset = 0;
+ enum cvmx_qlm_mode mode = CVMX_QLM_MODE_DISABLED;
+ int retry_count = 0;
+ int result = 0;
+
+ pcie_port &= 0x3;
+
+ /* Assume link down until proven up */
+ pcie_link_initialized[node][pcie_port] = false;
+
+ /* Attempt link initialization up to 3 times */
+ while (retry_count <= MAX_RETRIES) {
+#ifdef DEBUG_PCIE
+ if (retry_count)
+ printf("N%d:PCIE%d: Starting link retry %d\n", node, pcie_port,
+ retry_count);
+#endif
+ if (pcie_port >= CVMX_PCIE_PORTS) {
+#ifdef DEBUG_PCIE
+ printf("Invalid PCIe%d port\n", pcie_port);
+#endif
+ return -1;
+ }
+
+ qlm = __cvmx_pcie_get_qlm(node, pcie_port);
+
+ if (qlm < 0)
+ return -1;
+
+ mode = cvmx_qlm_get_mode(qlm);
+ if (__cvmx_pcie_check_pcie_port(node, pcie_port, mode))
+ return -1;
+
+ rst_soft_prst_reg = CVMX_RST_SOFT_PRSTX(pcie_port);
+ rst_ctl.u64 = CVMX_READ_CSR(CVMX_RST_CTLX(pcie_port));
+
+ if (OCTEON_IS_MODEL(OCTEON_CN78XX)) {
+ CVMX_WRITE_CSR(CVMX_DTX_PEMX_SELX(0, pcie_port), 0x17);
+ CVMX_WRITE_CSR(CVMX_DTX_PEMX_SELX(1, pcie_port), 0);
+ }
+
+ if (!rst_ctl.s.host_mode) {
+ printf("N%d:PCIE: Port %d in endpoint mode.\n",
+ node, pcie_port);
+ return -1;
+ }
+
+ /* Bring the PCIe out of reset */
+ rst_soft_prst.u64 = CVMX_READ_CSR(rst_soft_prst_reg);
+
+ /*
+ * After a chip reset the PCIe will also be in reset. If it
+ * isn't, most likely someone is trying to init it again
+ * without a proper PCIe reset.
+ */
+ if (rst_soft_prst.s.soft_prst == 0) {
+ /* Disable the MAC controller before resetting */
+ __cvmx_pcie_config_pemon(node, pcie_port, 0);
+
+ /* Reset the port */
+ rst_soft_prst.s.soft_prst = 1;
+ CVMX_WRITE_CSR(rst_soft_prst_reg, rst_soft_prst.u64);
+
+ /* Read to make sure write happens */
+ rst_soft_prst.u64 = CVMX_READ_CSR(rst_soft_prst_reg);
+
+ /* Keep PERST asserted for 2 ms */
+ udelay(2000);
+
+ /* Reset GSER_PHY to put in a clean state */
+ __cvmx_pcie_gser_phy_config(node, pcie_port, qlm);
+ requires_pem_reset = 1;
+
+ /* Enable MAC controller before taking pcie out of reset */
+ __cvmx_pcie_config_pemon(node, pcie_port, 1);
+ }
+
+ /* Deassert PERST */
+ rst_soft_prst.u64 = CVMX_READ_CSR(rst_soft_prst_reg);
+ rst_soft_prst.s.soft_prst = 0;
+ CVMX_WRITE_CSR(rst_soft_prst_reg, rst_soft_prst.u64);
+ rst_soft_prst.u64 = CVMX_READ_CSR(rst_soft_prst_reg);
+
+ /* Check if PLLs are locked after GSER_PHY reset. */
+ if (requires_pem_reset) {
+ cvmx_pemx_cfg_t pemx_cfg;
+
+ pemx_cfg.u64 = csr_rd(CVMX_PEMX_CFG(pcie_port));
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_GSERX_QLM_STAT(qlm), cvmx_gserx_qlm_stat_t,
+ rst_rdy, ==, 1, 10000)) {
+ printf("QLM%d: Timeout waiting for GSERX_QLM_STAT[rst_rdy]\n", qlm);
+ return -1;
+ }
+ if (pemx_cfg.cn78xx.lanes8 &&
+ (CVMX_WAIT_FOR_FIELD64(CVMX_GSERX_QLM_STAT(qlm + 1),
+ cvmx_gserx_qlm_stat_t, rst_rdy, ==, 1, 10000))) {
+ printf("QLM%d: Timeout waiting for GSERX_QLM_STAT[rst_rdy]\n",
+ qlm + 1);
+ return -1;
+ }
+ }
+
+ /* Wait 1ms for PCIe reset to complete */
+ udelay(1000);
+
+ /*
+ * Check and make sure PCIe came out of reset. If it doesn't
+ * the board probably hasn't wired the clocks up and the
+ * interface should be skipped
+ */
+ if (CVMX_WAIT_FOR_FIELD64_NODE(node, CVMX_RST_CTLX(pcie_port),
+ cvmx_rst_ctlx_t,
+ rst_done, ==, 1, 10000)) {
+ printf("N%d:PCIE: Port %d stuck in reset, skipping.\n", node, pcie_port);
+ return -1;
+ }
+
+ /* Check BIST status */
+ pemx_bist_status.u64 = CVMX_READ_CSR(CVMX_PEMX_BIST_STATUS(pcie_port));
+ if (pemx_bist_status.u64)
+ printf("N%d:PCIE: BIST FAILED for port %d (0x%016llx)\n", node, pcie_port,
+ CAST64(pemx_bist_status.u64));
+
+ /* Initialize the config space CSRs */
+#ifdef DEBUG_PCIE
+ printf("N%d:PCIE%d Initialize Config Space\n", node, pcie_port);
+#endif
+ __cvmx_pcie_rc_initialize_config_space(node, pcie_port);
+
+ /* Enable gen2 speed selection */
+ pciercx_cfg515.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG515(pcie_port));
+ pciercx_cfg515.s.dsc = 1;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG515(pcie_port), pciercx_cfg515.u32);
+
+ /* Do the link retries on the PCIe interface */
+ if (retry_count == MAX_RETRIES) {
+ /*
+ * This has to be done AFTER the QLM/PHY interface
+ * initialized
+ */
+ pciercx_cfg031.u32 =
+ CVMX_PCIE_CFGX_READ(pcie_port,
+ CVMX_PCIERCX_CFG031(pcie_port));
+ /*
+ * Drop speed to gen2 if link bouncing
+ * Result = -1 PEM in reset
+ * Result = 0: link speed and width ok no retry needed
+ * Result = 1: link errors or speed change needed
+ * Result = 2: lane width error
+ */
+ if (pciercx_cfg031.s.mls == 3 && result != 2) {
+#ifdef DEBUG_PCIE
+ printf("N%d:PCIE%d: Dropping speed to gen2\n", node, pcie_port);
+#endif
+ pciercx_cfg031.s.mls = 2;
+ CVMX_PCIE_CFGX_WRITE(pcie_port,
+ CVMX_PCIERCX_CFG031(pcie_port),
+ pciercx_cfg031.u32);
+
+ /* Set the target link speed */
+ pciercx_cfg040.u32 = CVMX_PCIE_CFGX_READ(
+ pcie_port, CVMX_PCIERCX_CFG040(pcie_port));
+ pciercx_cfg040.s.tls = 2;
+ CVMX_PCIE_CFGX_WRITE(pcie_port,
+ CVMX_PCIERCX_CFG040(pcie_port),
+ pciercx_cfg040.u32);
+ }
+ }
+
+ /* Bring the link up */
+ result = __cvmx_pcie_rc_initialize_link_gen2_v3(node, pcie_port);
+ if (result == 0) {
+#ifdef DEBUG_PCIE
+ printf("N%d:PCIE%d: Link does not need a retry\n", node, pcie_port);
+#endif
+ break;
+ } else if (result > 0) {
+ if (retry_count >= MAX_RETRIES) {
+ int link_up;
+#ifdef DEBUG_PCIE
+ printf("N%d:PCIE%d: Link requested a retry, but hit the max retries\n",
+ node, pcie_port);
+#endif
+ /* If the link is down, report failure */
+ pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(
+ pcie_port,
+ CVMX_PCIERCX_CFG032(pcie_port));
+ link_up = (pciercx_cfg032.s.dlla && !pciercx_cfg032.s.lt);
+ if (!link_up)
+ result = -1;
+ }
+#ifdef DEBUG_PCIE
+ else
+ printf("N%d.PCIE%d: Link requested a retry\n", node, pcie_port);
+#endif
+ }
+ if (result < 0) {
+ int ltssm_state = __cvmx_pcie_rc_get_ltssm_state(node, pcie_port);
+
+ printf("N%d:PCIE%d: Link timeout, probably the slot is empty (LTSSM %s)\n",
+ node, pcie_port, cvmx_pcie_get_ltssm_string(ltssm_state));
+ return -1;
+ }
+ retry_count++;
+ }
+
+ pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
+ /*
+ * Errata PEM-28816: Link retrain initiated at GEN1 can cause PCIE
+ * link to hang. For Gen1 links we must disable equalization
+ */
+ if (pciercx_cfg032.s.ls == 1) {
+#ifdef DEBUG_PCIE
+ printf("N%d:PCIE%d: Disabling equalization for GEN1 Link\n", node, pcie_port);
+#endif
+ pciercx_cfg548.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG548(pcie_port));
+ pciercx_cfg548.s.ed = 1;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG548(pcie_port), pciercx_cfg548.u32);
+ }
+
+ /* Errata PCIE-29440: Atomic operations to work properly */
+ pciercx_cfg038.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG038(pcie_port));
+ pciercx_cfg038.s.atom_op_eb = 0;
+ pciercx_cfg038.s.atom_op = 1;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG038(pcie_port), pciercx_cfg038.u32);
+
+ /* Errata PCIE-29566 PEM Link Hangs after going into L1 */
+ pciercx_cfg548.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG548(pcie_port));
+ pciercx_cfg548.s.grizdnc = 0;
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG548(pcie_port), pciercx_cfg548.u32);
+
+ if (result < 0)
+ return result;
+
+ /* Display the link status */
+ pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
+ printf("N%d:PCIe: Port %d link active, %d lanes, speed gen%d\n", node, pcie_port,
+ pciercx_cfg032.s.nlw, pciercx_cfg032.s.ls);
+
+ pcie_link_initialized[node][pcie_port] = true;
+ return 0;
+}
+
+/**
+ * Initialize a PCIe port for use in host(RC) mode. It doesn't enumerate the bus.
+ *
+ * @param pcie_port PCIe port to initialize for a node
+ *
+ * @return Zero on success
+ */
+int cvmx_pcie_rc_initialize(int pcie_port)
+{
+ int result;
+
+ if (OCTEON_IS_OCTEON2() || OCTEON_IS_MODEL(OCTEON_CN70XX))
+ result = __cvmx_pcie_rc_initialize_gen2(pcie_port);
+ else
+ result = __cvmx_pcie_rc_initialize_gen2_v3(pcie_port);
+
+ if (result == 0)
+ cvmx_error_enable_group(CVMX_ERROR_GROUP_PCI, pcie_port);
+ return result;
+}
+
+/**
+ * Shutdown a PCIe port and put it in reset
+ *
+ * @param pcie_port PCIe port to shutdown for a node
+ *
+ * @return Zero on success
+ */
+int cvmx_pcie_rc_shutdown(int pcie_port)
+{
+ u64 ciu_soft_prst_reg;
+ cvmx_ciu_soft_prst_t ciu_soft_prst;
+ int node;
+
+ /* Shutdown only if PEM is in RC mode */
+ if (!cvmx_pcie_is_host_mode(pcie_port))
+ return -1;
+
+ node = (pcie_port >> 4) & 0x3;
+ pcie_port &= 0x3;
+ cvmx_error_disable_group(CVMX_ERROR_GROUP_PCI, pcie_port);
+ /* Wait for all pending operations to complete */
+ if (CVMX_WAIT_FOR_FIELD64_NODE(node, CVMX_PEMX_CPL_LUT_VALID(pcie_port),
+ cvmx_pemx_cpl_lut_valid_t, tag, ==,
+ 0, 2000))
+ debug("PCIe: Port %d shutdown timeout\n", pcie_port);
+
+ if (OCTEON_IS_OCTEON3()) {
+ ciu_soft_prst_reg = CVMX_RST_SOFT_PRSTX(pcie_port);
+ } else {
+ ciu_soft_prst_reg = (pcie_port) ? CVMX_CIU_SOFT_PRST1 :
+ CVMX_CIU_SOFT_PRST;
+ }
+
+ /* Force reset */
+ ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
+ ciu_soft_prst.s.soft_prst = 1;
+ CVMX_WRITE_CSR(ciu_soft_prst_reg, ciu_soft_prst.u64);
+
+ return 0;
+}
+
+/**
+ * @INTERNAL
+ * Build a PCIe config space request address for a device
+ *
+ * @param node node
+ * @param port PCIe port (relative to the node) to access
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ *
+ * @return 64bit Octeon IO address
+ */
+static uint64_t __cvmx_pcie_build_config_addr(int node, int port, int bus, int dev, int fn, int reg)
+{
+ cvmx_pcie_address_t pcie_addr;
+ cvmx_pciercx_cfg006_t pciercx_cfg006;
+
+ pciercx_cfg006.u32 = cvmx_pcie_cfgx_read_node(node, port,
+ CVMX_PCIERCX_CFG006(port));
+ if (bus <= pciercx_cfg006.s.pbnum && dev != 0)
+ return 0;
+
+ pcie_addr.u64 = 0;
+ pcie_addr.config.upper = 2;
+ pcie_addr.config.io = 1;
+ pcie_addr.config.did = 3;
+ pcie_addr.config.subdid = 1;
+ pcie_addr.config.node = node;
+ pcie_addr.config.es = _CVMX_PCIE_ES;
+ pcie_addr.config.port = port;
+ /* Always use config type 0 */
+ if (pciercx_cfg006.s.pbnum == 0)
+ pcie_addr.config.ty = (bus > pciercx_cfg006.s.pbnum + 1);
+ else
+ pcie_addr.config.ty = (bus > pciercx_cfg006.s.pbnum);
+ pcie_addr.config.bus = bus;
+ pcie_addr.config.dev = dev;
+ pcie_addr.config.func = fn;
+ pcie_addr.config.reg = reg;
+ return pcie_addr.u64;
+}
+
+/**
+ * Read 8bits from a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ *
+ * @return Result of the read
+ */
+uint8_t cvmx_pcie_config_read8(int pcie_port, int bus, int dev, int fn, int reg)
+{
+ u64 address;
+ int node = (pcie_port >> 4) & 0x3;
+
+ pcie_port &= 0x3;
+ address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
+ if (address)
+ return cvmx_read64_uint8(address);
+ else
+ return 0xff;
+}
+
+/**
+ * Read 16bits from a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ *
+ * @return Result of the read
+ */
+uint16_t cvmx_pcie_config_read16(int pcie_port, int bus, int dev, int fn, int reg)
+{
+ u64 address;
+ int node = (pcie_port >> 4) & 0x3;
+
+ pcie_port &= 0x3;
+ address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
+ if (address)
+ return le16_to_cpu(cvmx_read64_uint16(address));
+ else
+ return 0xffff;
+}
+
+static uint32_t __cvmx_pcie_config_read32(int node, int pcie_port, int bus, int dev, int func,
+ int reg, int lst)
+{
+ u64 address;
+
+ address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, func, reg);
+ if (lst) {
+ if (address && pcie_link_initialized[node][pcie_port])
+ return le32_to_cpu(cvmx_read64_uint32(address));
+ else
+ return 0xffffffff;
+ } else if (address) {
+ return le32_to_cpu(cvmx_read64_uint32(address));
+ } else {
+ return 0xffffffff;
+ }
+}
+
+/**
+ * Read 32bits from a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ *
+ * @return Result of the read
+ */
+uint32_t cvmx_pcie_config_read32(int pcie_port, int bus, int dev, int fn, int reg)
+{
+ int node = (pcie_port >> 4) & 0x3;
+
+ pcie_port &= 0x3;
+ return __cvmx_pcie_config_read32(node, pcie_port, bus, dev, fn, reg,
+ pcie_link_initialized[node][pcie_port]);
+}
+
+/**
+ * Write 8bits to a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ * @param val Value to write
+ */
+void cvmx_pcie_config_write8(int pcie_port, int bus, int dev, int fn, int reg, uint8_t val)
+{
+ u64 address;
+ int node = (pcie_port >> 4) & 0x3;
+
+ pcie_port &= 0x3;
+ address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
+ if (address)
+ cvmx_write64_uint8(address, val);
+}
+
+/**
+ * Write 16bits to a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ * @param val Value to write
+ */
+void cvmx_pcie_config_write16(int pcie_port, int bus, int dev, int fn, int reg, uint16_t val)
+{
+ u64 address;
+ int node = (pcie_port >> 4) & 0x3;
+
+ pcie_port &= 0x3;
+ address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
+ if (address)
+ cvmx_write64_uint16(address, cpu_to_le16(val));
+}
+
+/**
+ * Write 32bits to a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ * @param val Value to write
+ */
+void cvmx_pcie_config_write32(int pcie_port, int bus, int dev, int fn, int reg, uint32_t val)
+{
+ u64 address;
+ int node = (pcie_port >> 4) & 0x3;
+
+ pcie_port &= 0x3;
+ address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
+ if (address)
+ cvmx_write64_uint32(address, cpu_to_le32(val));
+}
+
+/**
+ * Read a PCIe config space register indirectly. This is used for
+ * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
+ *
+ * @param pcie_port PCIe port to read from
+ * @param cfg_offset Address to read
+ *
+ * @return Value read
+ */
+uint32_t cvmx_pcie_cfgx_read(int pcie_port, uint32_t cfg_offset)
+{
+ return cvmx_pcie_cfgx_read_node(0, pcie_port, cfg_offset);
+}
+
+uint32_t cvmx_pcie_cfgx_read_node(int node, int pcie_port, uint32_t cfg_offset)
+{
+ cvmx_pemx_cfg_rd_t pemx_cfg_rd;
+
+ pemx_cfg_rd.u64 = 0;
+ pemx_cfg_rd.s.addr = cfg_offset;
+ CVMX_WRITE_CSR(CVMX_PEMX_CFG_RD(pcie_port), pemx_cfg_rd.u64);
+ pemx_cfg_rd.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG_RD(pcie_port));
+
+ return pemx_cfg_rd.s.data;
+}
+
+/**
+ * Write a PCIe config space register indirectly. This is used for
+ * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
+ *
+ * @param pcie_port PCIe port to write to
+ * @param cfg_offset Address to write
+ * @param val Value to write
+ */
+void cvmx_pcie_cfgx_write(int pcie_port, uint32_t cfg_offset, uint32_t val)
+{
+ cvmx_pcie_cfgx_write_node(0, pcie_port, cfg_offset, val);
+}
+
+void cvmx_pcie_cfgx_write_node(int node, int pcie_port, uint32_t cfg_offset, uint32_t val)
+{
+ cvmx_pemx_cfg_wr_t pemx_cfg_wr;
+
+ pemx_cfg_wr.u64 = 0;
+ pemx_cfg_wr.s.addr = cfg_offset;
+ pemx_cfg_wr.s.data = val;
+ CVMX_WRITE_CSR(CVMX_PEMX_CFG_WR(pcie_port), pemx_cfg_wr.u64);
+}
+
+extern int cvmx_pcie_is_host_mode(int pcie_port);
+
+/**
+ * Initialize a PCIe port for use in target(EP) mode.
+ *
+ * @param pcie_port PCIe port to initialize for a node
+ *
+ * @return Zero on success
+ */
+int cvmx_pcie_ep_initialize(int pcie_port)
+{
+ int node = (pcie_port >> 4) & 0x3;
+
+ if (cvmx_pcie_is_host_mode(pcie_port))
+ return -1;
+
+ pcie_port &= 0x3;
+
+ /* CN63XX Pass 1.0 errata G-14395 requires the QLM De-emphasis be
+ * programmed
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_0)) {
+ if (pcie_port) {
+ cvmx_ciu_qlm1_t ciu_qlm;
+
+ ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM1);
+ ciu_qlm.s.txbypass = 1;
+ ciu_qlm.s.txdeemph = 5;
+ ciu_qlm.s.txmargin = 0x17;
+ csr_wr(CVMX_CIU_QLM1, ciu_qlm.u64);
+ } else {
+ cvmx_ciu_qlm0_t ciu_qlm;
+
+ ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM0);
+ ciu_qlm.s.txbypass = 1;
+ ciu_qlm.s.txdeemph = 5;
+ ciu_qlm.s.txmargin = 0x17;
+ csr_wr(CVMX_CIU_QLM0, ciu_qlm.u64);
+ }
+ }
+
+ /* Enable bus master and memory */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIEEPX_CFG001(pcie_port), 0x6);
+
+ /* Max Payload Size (PCIE*_CFG030[MPS]) */
+ /* Max Read Request Size (PCIE*_CFG030[MRRS]) */
+ /* Relaxed-order, no-snoop enables (PCIE*_CFG030[RO_EN,NS_EN] */
+ /* Error Message Enables (PCIE*_CFG030[CE_EN,NFE_EN,FE_EN,UR_EN]) */
+ {
+ cvmx_pcieepx_cfg030_t pcieepx_cfg030;
+
+ pcieepx_cfg030.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIEEPX_CFG030(pcie_port));
+ pcieepx_cfg030.s.mps = MPS_CN6XXX;
+ pcieepx_cfg030.s.mrrs = MRRS_CN6XXX;
+ pcieepx_cfg030.s.ro_en = 1; /* Enable relaxed ordering. */
+ pcieepx_cfg030.s.ns_en = 1; /* Enable no snoop. */
+ pcieepx_cfg030.s.ce_en = 1; /* Correctable error reporting enable. */
+ pcieepx_cfg030.s.nfe_en = 1; /* Non-fatal error reporting enable. */
+ pcieepx_cfg030.s.fe_en = 1; /* Fatal error reporting enable. */
+ pcieepx_cfg030.s.ur_en = 1; /* Unsupported request reporting enable. */
+ CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIEEPX_CFG030(pcie_port), pcieepx_cfg030.u32);
+ }
+
+ /* Max Payload Size (DPI_SLI_PRTX_CFG[MPS]) must match
+ * PCIE*_CFG030[MPS]
+ */
+ /* Max Read Request Size (DPI_SLI_PRTX_CFG[MRRS]) must not
+ * exceed PCIE*_CFG030[MRRS]
+ */
+ cvmx_dpi_sli_prtx_cfg_t prt_cfg;
+ cvmx_sli_s2m_portx_ctl_t sli_s2m_portx_ctl;
+
+ prt_cfg.u64 = CVMX_READ_CSR(CVMX_DPI_SLI_PRTX_CFG(pcie_port));
+ prt_cfg.s.mps = MPS_CN6XXX;
+ prt_cfg.s.mrrs = MRRS_CN6XXX;
+ /* Max outstanding load request. */
+ prt_cfg.s.molr = 32;
+ CVMX_WRITE_CSR(CVMX_DPI_SLI_PRTX_CFG(pcie_port), prt_cfg.u64);
+
+ sli_s2m_portx_ctl.u64 = CVMX_READ_CSR(CVMX_PEXP_SLI_S2M_PORTX_CTL(pcie_port));
+ if (!(OCTEON_IS_MODEL(OCTEON_CN78XX) || OCTEON_IS_MODEL(OCTEON_CN73XX) ||
+ OCTEON_IS_MODEL(OCTEON_CNF75XX)))
+ sli_s2m_portx_ctl.cn61xx.mrrs = MRRS_CN6XXX;
+ CVMX_WRITE_CSR(CVMX_PEXP_SLI_S2M_PORTX_CTL(pcie_port), sli_s2m_portx_ctl.u64);
+
+ /* Setup Mem access SubDID 12 to access Host memory */
+ cvmx_sli_mem_access_subidx_t mem_access_subid;
+
+ mem_access_subid.u64 = 0;
+ mem_access_subid.s.port = pcie_port; /* Port the request is sent to. */
+ mem_access_subid.s.nmerge = 0; /* Merging is allowed in this window. */
+ mem_access_subid.s.esr = 0; /* Endian-swap for Reads. */
+ mem_access_subid.s.esw = 0; /* Endian-swap for Writes. */
+ mem_access_subid.s.wtype = 0; /* "No snoop" and "Relaxed ordering" are not set */
+ mem_access_subid.s.rtype = 0; /* "No snoop" and "Relaxed ordering" are not set */
+ /* PCIe Address Bits <63:34>. */
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+ mem_access_subid.cn68xx.ba = 0;
+ else
+ mem_access_subid.cn63xx.ba = 0;
+ CVMX_WRITE_CSR(CVMX_PEXP_SLI_MEM_ACCESS_SUBIDX(12 + pcie_port * 4), mem_access_subid.u64);
+
+ return 0;
+}
+
+/**
+ * Wait for posted PCIe read/writes to reach the other side of
+ * the internal PCIe switch. This will insure that core
+ * read/writes are posted before anything after this function
+ * is called. This may be necessary when writing to memory that
+ * will later be read using the DMA/PKT engines.
+ *
+ * @param pcie_port PCIe port to wait for
+ */
+void cvmx_pcie_wait_for_pending(int pcie_port)
+{
+ cvmx_sli_data_out_cnt_t sli_data_out_cnt;
+ int a;
+ int b;
+ int c;
+
+ sli_data_out_cnt.u64 = csr_rd(CVMX_PEXP_SLI_DATA_OUT_CNT);
+ if (pcie_port) {
+ if (!sli_data_out_cnt.s.p1_fcnt)
+ return;
+ a = sli_data_out_cnt.s.p1_ucnt;
+ b = (a + sli_data_out_cnt.s.p1_fcnt - 1) & 0xffff;
+ } else {
+ if (!sli_data_out_cnt.s.p0_fcnt)
+ return;
+ a = sli_data_out_cnt.s.p0_ucnt;
+ b = (a + sli_data_out_cnt.s.p0_fcnt - 1) & 0xffff;
+ }
+
+ while (1) {
+ sli_data_out_cnt.u64 = csr_rd(CVMX_PEXP_SLI_DATA_OUT_CNT);
+ c = (pcie_port) ? sli_data_out_cnt.s.p1_ucnt :
+ sli_data_out_cnt.s.p0_ucnt;
+ if (a <= b) {
+ if (c < a || c > b)
+ return;
+ } else {
+ if (c > b && c < a)
+ return;
+ }
+ }
+}
+
+/**
+ * Returns if a PCIe port is in host or target mode.
+ *
+ * @param pcie_port PCIe port number (PEM number)
+ *
+ * @return 0 if PCIe port is in target mode, !0 if in host mode.
+ */
+int cvmx_pcie_is_host_mode(int pcie_port)
+{
+ int node = (pcie_port >> 4) & 0x3;
+ cvmx_mio_rst_ctlx_t mio_rst_ctl;
+
+ pcie_port &= 0x3;
+ if (OCTEON_IS_MODEL(OCTEON_CN78XX) || OCTEON_IS_MODEL(OCTEON_CN73XX)) {
+ cvmx_pemx_strap_t strap;
+
+ strap.u64 = CVMX_READ_CSR(CVMX_PEMX_STRAP(pcie_port));
+ return (strap.cn78xx.pimode == 3);
+ } else if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ cvmx_rst_ctlx_t rst_ctl;
+
+ rst_ctl.u64 = csr_rd(CVMX_RST_CTLX(pcie_port));
+ return !!rst_ctl.s.host_mode;
+ }
+
+ mio_rst_ctl.u64 = csr_rd(CVMX_MIO_RST_CTLX(pcie_port));
+ if (OCTEON_IS_MODEL(OCTEON_CN61XX) || OCTEON_IS_MODEL(OCTEON_CNF71XX))
+ return mio_rst_ctl.s.prtmode != 0;
+ else
+ return !!mio_rst_ctl.s.host_mode;
+}
--
2.29.2
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